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

<passage>:
Extensive research did not uncover any evidence that the sprawling automatic brain's silver gauges and plastic toggles as proudly as if he had just personally gave birth to it. "This will simplify your job to the point of a pleasant diversion, Madison." "Are you going to keep paying me for staying with my little hobby?" I asked, suspiciously eyeing my chrome competitor. "The Actuarvac poses no threat to your career. It will merely keep you that no false claim could be filed. Of course, the brain will make He took it like a man. "That's what the machine is for," he said philosophically. "To detect human error. Hmm. What kind of a shove do you get out of this?" "You want me to project it in a movie theater and see how it stands it all alone in the dark?" I asked. Four hours of flipping switches and looking at microfilm projections while a tawny redhead in a triangular fronted uniform carried me reels to order gave me only two ideas. Neither was very original. The one be accident-prone. I rejected that one almost immediately. While an accident-prone was in himself a statistical anomaly, the idea of a whole town of them Furthermore, the work at the quarry could hardly explain the excessive Tentatively, I decided that for generations the citizens of Granite City had been in an organized conspiracy to defraud up. I used my pocket innercom and had my secretary get me a plane reservation and a gun. After so many profitable decades, Granite City wasn't going to take kindly to my spoil-sport interference. Since that put me back in the days of horsepower, I trotted over to the automobile rental and hired a few hundred of them under the hood of a Rolls. That was about the only brand of car that fit me. I hadn't been able to get my legs into any other foreign car since I was fifteen, and I have steadfastly refused to enter an American model since they all sold out their birthrights as passenger cars and went over to the tractor-trailer combinations they used only for cargo trucks when I was The whole trip hardly seemed worth it when I saw the cluster of tumble of dingy building blocks tossed in front of a rolled-up indigo The old man watched as I climbed down and locked up the Rolls. "You would probably get killed if you did run the car here, you know," he said conversationally. "Well," I said, "I'll be getting along." I tried to walk sideways so I "Come back," he said, as if he had doubts. The signs of a menacing conspiracy were growing stronger, I felt. I had my automatic inside my shirt, but I decided I might need a less lethal means of expression. Without breaking stride, I scooped up a baseball-size hunk of bluish rock from the road and slipped it into my small change pocket. I have made smarter moves in my time. As I approached the house at the end of the lane, I saw it was about the worse construction job I had seen in my life. It looked as architecturally secure as a four-year-old's drawing of his home. The fought down the dust in my nose, afraid of the consequences of a sneeze scalds, Mr. Madison." "I don't blame them, but they ain't. Look, the company gambles on luck, "There's something to that. We call it probability, not luck." "Well, probability says that more accidents are going to occur in I shook my head at Thompson. "That's not probability. Theoretically, "We're not," Thompson snapped. "Or else something is causing you to have this trouble. Maybe the whole town is a bunch of dope addicts. Maybe you grow your own mescalin Thompson laughed. "Whatever is going on, I'm going to find it out. I don't care what you do, but if I can find a greater risk here and prove it, the Commission will let us up our rates for this town. Probably beyond the capacity of these people, I'm afraid." "That would be a real tragedy, Mr. Madison. Insurance is vital to this town. Nobody could survive a year here without insurance. People pay me for their premiums before they pay their grocery bills." I shrugged, sorrier than I could let on. "I won't be able to pay for my own groceries, marshal, if I don't do the kind of job the company a car. It would be suicide for anybody to drive a car, same as it would be to have a gas or oil stove, instead of coal, or to own a bathtub." I took a deep breath. I couldn't see any in the way they sliced the granite out of the mountain. The idea of a four-year-old—a four-year-old moron—going after a mound of raspberry ice cream kept turning up in my mind as I tools. The place was as gory as a battlefield. "What are you looking for, bud?" The low, level snarl had come from a burly character in a syn-leather jacket and narrow-brimmed Stetson. "The reason you have so many accidents here," I said frankly. "I'm from "This rock is part of it—" "Listen, Madison, don't talk about what you don't know anything different way of getting out every piece of stone." "It's too bad." "What's too bad?" "That you chose the wrong way so often," I said. Madison, we have been working this quarry for generations, sometimes getting the stone out. That's the way we like it. We don't want any "If this quarry has anything to do with defrauding Manhattan-Universal, that I shouldn't have said that. The general store was called a supermarket, but it wasn't particularly superior. I took a seat at the soda fountain and took a beer, politely declining the teen-age clerk's offer of a shot of white lightning from the Pepsi-Cola fountain syrup jug for a quarter. Behind me were three restaurant tables and one solitary red-upholstered More and more, I was coming to believe that Granite City wasn't a job decent citizens felt secure in conspiracy to defraud an honored corporation. I had merely established to my intuitive satisfaction that the job was not in my field. I glanced at the old man. The proprietor of the store knew him and evidently thought him harmless enough to feed. "I think I can make it down the mountain before dark, Old Timer," I and resigned. "I doubt very much if either of us will be leaving, Mr. Madison," he said. "Now." trusting in that case." they refuse to trust to leave He has politely refused to let me use it. I'm a suspicious and undesirable character "Unfriendly of them," I said conservatively. "But how can they stop you from packing your dental floss and cutting out?" "Haskel has the only motor vehicle in town—a half-ton pick-up, a minuscule contrivance less than the size of a passenger car. He makes It seemed incredible—more than that, unlikely, to me. "How about the granite itself? How do they ship it out?" "I can see why you want to ride out with me," I said. "Haven't you ever thought of just walking "Fifty miles down a steep mountain road? I'm an old man, Mr. Madison, to have satisfied Allen Pinkerton or John Edgar Hoover. "Okay," I drawled. "I'll accept your story for the moment. Now answer me the big query: Why are the good people of Granite City doing this to "Look, I know the Klan is a growing organization but I can't go along "Madison, understand me, I insist. Ethnologically speaking, it is well . They can't foresee the stay away from the rock as much as possible, but it's getting to me." I should have remembered something then. But, naturally, I didn't.

<question>:
Why did Madison ultimately think gathering the large rock was a bad decision?

<options>:
A It would begin to affect his memory later.
B It was too heavy to carry around the city.
C The Professor would eventually use it to prevent him from leaving.
D The gun would have been a better option for self-defense.

<answer>:

A