Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
By W. T. HAGGERT Illustrated by WOOD and eviction if he came away from this interview still unemployed. Clay, at the Association of Professional Engineers, who had set up the "Mr. Lexington?" he said. "I'm Peter Manners. The Association—" of how we live." "I'm applying for a job as engineer." "Stockpiled you," Lexington said. "That guff about receiving training instead of wages!" said Lexington. calculus." "Just as I said—they stockpiled you, instead of using you as an engineer. They hired you at a cut wage and taught you things that would be useful only in their own company, while in the meantime you were getting weaker in the subjects you'd paid to learn. Or are you one of something you'd forgotten how to do. At that point, they could take you out of the stockpile, put you in just about any job they wanted, at any wage you'd stand for, and they'd have an indentured worker with a "They start the talk about a shortage and then they keep it going. Why? So youngsters will take up engineering thinking they'll wind up among a a shortage! And the stockpiles are the ones who made it, and who keep it going! And the hell of it is that they can't stop—when one does it, they all have "Very good," said Lexington. "Most people only notice the automatic "I'm the only one there is." Peter stared his disbelief. Automated plants were nothing new, but they all had their limitations. Either they dealt with exactly similar products or things that could be handled on a flow basis, like oil or water-soluble chemicals. Even these had no more to do than process the Lexington paused here. "This is the bay used by the trucks arriving with raw materials," he said. "They back up to this door, and a set of automatic jacks outside lines up the trailer body with the door exactly. Then the door opens and the truck is unloaded by these materials handling machines." Peter didn't see him touch anything, but as he spoke, three glistening machines, apparently self-powered, rolled noiselessly up to the door in relaxed position that somehow indicated readiness. Lexington went over to one of them and patted it lovingly. "Really, these machines are only an extension of one large machine. The whole plant, as a matter of fact, is controlled from one point and is really a single unit. These materials handlers, or manipulators, were about the toughest things in the place to design. But they're tremendously useful. You'll see a lot of them around." Lexington was about to leave the side of the machine when abruptly one and before Lexington could react, all three machines were moving away a large bay where racks of steel plate, bar forms, nuts, bolts, and other materials were stored. "After unloading a truck, the machines check the shipment, report any shortages or overages, and store the materials here," he said, the trace of anger not yet gone from his voice. "When an order is received, it's translated into the catalogue numbers used internally within the plant, and machines like the ones you just saw withdraw the necessary materials from stock, make the component parts, assemble them, and package the finished goods for shipment. Simultaneously, an order is sent to the billing section to bill the customer, and an order is sent to our trucker to come and pick the shipment up. Meanwhile, if the withdrawal of the materials required has depleted our stock, the purchasing section is instructed to order more raw materials. I'll take you through the manufacturing and assembly sections right now, but they're too noisy for me to explain what's going on while we're there." each one seemingly intent on cutting, bending, welding, grinding or carrying some bit of metal, or just standing idle, waiting for something to do. The two-armed manipulators Peter had just seen were everywhere, scuttling from machine to machine, apparently with an exact knowledge of what they were doing and the most efficient way of doing it. that was laboring beside him at the moment. Nervously, he looked for an exit, but his apprehension was unnecessary. The machines seemed to know where they were and avoided the two men, or stopped to wait for them to room where a typewriter could be heard clattering away. "Standard business machines, operated by the central control mechanism. In there's a very similar rig set up in conjunction with an automatic bookkeeper to keep track of the pennies and to bill the customers." "Then all you do is read the incoming mail and maintain the machinery?" Finally Lexington spoke. "I know it's hard to believe, but there it is." "Hard to believe?" said Peter. "I almost can't. The trade journals run articles about factories like this one, but planned for ten, maybe twenty years in the future." Lexington mopped his forehead with a large white handkerchief. tried commerce, with accounting, so I gave up and started working for one of my competitors. It wasn't too long before I saw that the only way I could get ahead was to open up on my own." girl. "For the next few years, I concentrated on getting rid of as many employees as I could, by replacing them with automatic machines. I'd design the control circuits myself, in many cases wire the things up myself, always concentrating on replacing men with machines. But it wasn't very successful. I found that the more automatic I made my plant, the lower my costs went. The lower my costs went, the more business I got, and the more I had to expand." Lexington scowled. "I got sick of it. I decided to try developing one multi-purpose control circuit that would control everything, from ordering the raw materials to shipping the finished goods. As I told knowledge, I had a few ideas on how to do it. It took me three years, but I began to see that I could develop circuitry that could remember, compare, detect similarities, and so on. Not the way they do it today, of course. To do what I wanted to do with these big clumsy magnetic work for me. "By creating the proper compounds, with their molecules arranged in predetermined matrixes, I found I could duplicate electrical circuitry in units so tiny that my biggest problem was getting into and out of way they solved the problem of translating a picture on a screen into electrical signals, developed equipment to scan the units cyclically, and once I'd done that, the battle was over. "I built this building and incorporated it as a separate company, to compete with my first outfit. In the beginning, I had it rigged up to do only the manual work that you saw being done a few minutes ago in the back of this place. I figured that the best thing for me to do would be to turn the job of selling my stuff over to jobbers, leaving me free to do nothing except receive orders, punch the catalogue numbers into the control console, do the billing, and collect the Lexington smiled. "Well, automated as it was, it couldn't compete with started working, to see my old company go belly up. This company bought the old firm's equipment for next to nothing and I wound up with all my assets, but only one employee—me. action with another, by and by the unit would be able to see patterns. "Then, through the existing command output, I figured these new units would be able to control the plant, continuing the various patterns of activity that I'd already established." or maybe not at all. If all the orders were out on schedule, or ahead of time, I'd press it ahead of time, or maybe twice in the same day. Pretty soon the machine got the idea. "I'll never forget the day I picked up an incoming order form from one explanation. "The machine had realized that whenever one of those forms came in, I copied the list of goods from it onto the in-progress list through the console keyboard, thus activating the producing mechanisms in the back of the plant. The machine had done it for me this time, then locked the Lexington took the coffee from the top of the car, obviously angry "Not only expensive, but stupid and impractical!" exploded Lexington. the name Lexington, but it wasn't. My wife's name was Alexis, and it seen, and I remember it as if it just happened. 'MR. A LEXINGTON, LEX

<question>:
What does Lexington make at the factory?

<options>:
A Automotive components
B Basic parts
C Aircraft components
D Robots to automate other factories

<answer>:

B