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

<passage>:
... and it comes out here By LESTER DEL REY Illustrated by DON SIBLEY don't have the right attitude toward tenses for a situation like this. Anyhow, you'll let me in. I did, so you will. Thanks. You think you're crazy, of course, but you'll find out you aren't. It's just that things are a bit confused. And don't look at the machine out there too long—until you get used to it, you'll find it's how you feel I felt the same way when he—that is, of course, I or years. And you can look at the revenue stamp date, if you still doubt my story. You'll believe it eventually, though, so it doesn't matter. Right now, you're shocked. It's a real wrench when a man meets himself for the first time. Some kind of telepathy seems to work between two of the same people. You sense and you'll be getting used to the idea that you are the man who makes who put atomic power in every home. You won't exactly believe it, but you'll want to go along. it isn't there. There is exactly nothing there—in fact, there is no there turns over and pokes back at you. Doesn't hurt, and when you pull your You turn to me, getting used to the idea. "So this is the fourth dimension?" you ask. Then you feel silly, because you'll remember that I said you'd ask if you're going to skip over the so-called fourth without traveling along it, you'd need a fifth. Don't ask me. I didn't invent open, yet you haven't seen any effects of air loss. "Where are we getting our air?" you ask. "Or why don't we lose it?" feel a dankish sort of air replace the stale air, and you breathe of simple, short-limbed, one-piece affair I put on, but it feels comfortable. anyway?" I'd told you that, too, but you've forgotten. "As near as I can guess, it's about 2150. He told me, just as I'm telling you, that it's an interstellar civilization." "Since nobody ever stole it, it's safe." We get in the elevator, and I say "first" to it. It gives out a no feeling of acceleration—some kind of false gravity they use in the questions of a man, who points, and I turn and move off. them, realizing for the first time that things have changed. that announces: Trav:l Biwrou—F:rst-Clas Twrz—Marz, Viin*s, and Why should they? You wouldn't care if you saw a man in a leopard-skin You get up your courage and go up to a boy selling something that might go home. But then a guard comes to the gate. Except for the short legs in his suit and the friendly grin on his face, he looks like any other "Thanks," you mutter, wondering what kind of civilization can produce them to check his latest theory of how they work. Too bad he could not explain the principle, either. Someone will, some day, though. Lord, the genius of that twentieth century inventor! It's quite a goes through a crazy wiggle inside, stops turning out a continual row of what seem to be bearings, and slips something the size of a penny in size. You can have it made into a ring on the third floor during morning hours for one-tenth credit. If you have more than one child, lot smaller than you thought. They seem to be in chronological order, and the latest one, marked 2147—Rincs Dyn*pat: , is about the size of a desk telephone. The earlier ones are larger, of course, clumsier, but with variations, probably depending on the power output. A big sign that this is the first invention which leaped full blown into basically final form. You study it, but it mentions casually the inventor, without giving his name. Either they don't know it, or they take it for granted that everyone does, which seems more probable. They call attention to the fact that they have the original model of the first atomic generator chosen cyclic rate from direct current to one thousand megacycles, and any amperage up to one thousand, its maximum power output being fifty kilowatts, limited by the current-carrying capacity of the each side. "Nice," the guard says over your shoulder. "It finally wore out one of the cathogrids and we had to replace that, but otherwise it's exactly as the great inventor made it. And it still operates as well as ever. Like to have me tell you about it?" "Not particularly," you begin, and then realize bad manners might be conspicuous here. While you're searching for an answer, the guard pulls to nineteenth century man. You'll pardon me?" You work down the line. It'd be foolish to take the early model if you probably bolted down, too, but you try it tentatively and you find it it only weighs about fifty pounds! Naturally, it can be carried. You expect a warning bell, but nothing happens. As a matter of fact, happen to you. But of course, just as I did, you're going to miss a lot of what I say from now on, and have to find out for yourself. But after he told me, but I can't be sure. So I'll keep on talking. I probably can't help it, anyhow. Pre-set, you might say. There's another yell behind you. Something goes over your head and drops on the sidewalk just in front of your feet, with a sudden ringing sound. You don't wait to find out seeming to come out of the sockets, and that atomic generator getting heavier at every step. "You can't exert yourself that hard in this heat, fellow," the cop Reaction sets in a bit and your knees begin to buckle, but you shake it. The stranger lifts an eyebrow and goes off at once when you nod dissimilar in other ways. He snaps it open and you get set to duck. "You forgot the prints, monograph, and patent applications," he says. this building. Just let us know when you're finished with the model and we'll pick it up." You swallow several sets of tonsils you had removed years before, and you for some more information, which you give him at random. It seems to satisfy your amiable guard friend. He finally smiles in satisfaction doped out the fact that they'd been robbed, or whether they were trying to help you. You don't care which it is. The field springs up around you don't care. You jump out and start pulling out that atomic generator and taking it inside. It isn't hard to disassemble, but you don't learn a thing just some things that can be made easily enough, all obviously of common metals. But when you put it together again, about an hour later, you notice something. Everything in it is brand-new and there's one set of copper wires missing! It won't work. You put some #12 house wire in, exactly like the set on the other side, drop in some iron filings, and try it again. in time, somehow, and is back to its original youth—minus the But you begin getting more of a jolt when you find that the papers are all in your own writing, that your name is down as the inventor, and that the date of the patent application is 1951. It will begin to soak in, then. You pick up an atomic generator in the yourself.... Who invented what? And who built which? Before long, your riches from the generator are piling in. Little kids from school are coming around to stare at the man who changed history and made atomic power so common that no nation could hope to be anything but a democracy and a peaceful one—after some of the worst times in history for a few years. Your name eventually becomes as common as Ampere, or Faraday, or any other spelled without a capital letter. But you're thinking of the puzzle. You can't find any answer. view—and telling your younger self all these things I'm telling you. But now.... Well, the drinks are finished. You're woozy enough to go along with me without protest, and I want to find out just why those people up there

<question>:
Which isn't a feeling that the older man expects of the younger man?

<options>:
A anger
B worry
C confusion
D surprise

<answer>:

A