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

<passage>:
I am a Nucleus By STEPHEN BARR Illustrated by GAUGHAN [Transcriber's Note: This etext was produced from according to my Greenwich Village thermometer, it was ninety-six. I got dressed and went into the living room, and wished ardently that my "Madison and Fifty-fourth," I said. and then his chattering drill hit it. There was a faint bang and the thing disintegrated. It knocked him on moment of the explosion—if so feeble a thing can be called one—I pink adhesive which I put on the tiny cut. When I got to the studio, I found that I had missed the story conference. During the day, by actual count, I heard the phrase "I'm just I, on the that I cannot take a breath without her. She is right, but not for the you take out the Milk or Butter, Put it Right Back. And Close the Door, some of the highball in hopes of inspiration and surcease from the sentence. exercising his flock of pigeons. They wheeled in a circle, hoping to be they seemed to bunch up together. By some curious chance, they all afternoon. on the floor. About half were face down, as might be expected, and the the four men, with half frightened, incredulous looks, and in silence, it. Those guys didn't believe it. Every round normal, nothing unusual about the hands—three of a kind, a low straight, that sort of thing and one guy got queens over tens, until it gets to be my deal. Brother! Straight flush to the king—every time! And each time, somebody else has four aces...." "I'll come, too. I need air." At the delicatessen on the corner, the man gave me three bottles in moment. one. That was tied in three knots. All right , I told myself, it was the wind. But I felt the time had come for me to get expert advice, so I went to the phone to call McGill. McGill is an assistant professor of mathematics at a university uptown and lives near us. He is highly imaginative, but we believe he knows everything. When I picked up the receiver, the line sounded dead and I thought, more trouble. Then I heard a man cough and I said hello. McGill's voice said, "Alec? You must have picked up the receiver just as we were the side of the correct ones, and tore out the page, with my face red. This was absolutely not my day. "Well," McGill said, "nothing you've told me is impossible or supernatural. Just very, very improbable. In fact, the odds against that poker game alone would lead me to suspect Nat, well as I know him. It's all those other things...." would be actually they all come up heads." floor. They clattered and bounced—and bounced together—and stacked themselves into a neat pile. I looked at McGill. His eyes were narrowed. Without a word, he took a handful of coins from his own pocket and threw them. These coins didn't stack. They just fell into an exactly straight line, the adjacent ones touching. "Well," I said, "what more do you want?" "Great Scott," he said, and sat down. "I suppose you know that there are two great apparently opposite principles governing the actually, it goes "Hm. You're the center, all right. But why?" "Center of what?" I asked. "I feel as though I were the center of an electrical storm. Something has it in for me!" McGill grinned. "Don't be superstitious. And especially don't be anthropomorphic." "Well, if it's the opposite of random, it's got to be a form of life." being rearranged. A crystal, for example, is not life, but it's a kitchen and I'm not allowed to cook. Only eggs and coffee." heard one of them say to Danny, "I don't know what the hell's going "All right, smart guy!" they shouted in unison, and barged ahead, here!" Three women in a confused wrangle, with their half-open umbrellas the "Oh, Alec!" she said, and managed to detach herself. "Are you all right?" Was I all right! "Molly! What are you doing here?" "Of course I'm all right. But why...." busy signal. Oh, dear, are you sure you're all right?" I put my arm around her and glanced at McGill. He had an inward look. to it. "Trouble does seem to follow you, Mr. Graham," was all he said. When we got upstairs, I turned to McGill. "Explain to Molly," I said. "And incidentally to me. I'm not properly briefed yet." He did so, and when he got to the summing up, I had the feeling she was a jump ahead of him. "In other words, you think it's something organic?" "Well," McGill said, "I'm trying to think of anything else it might be. I'm not doing so well," he confessed. "But so far as I can see," Molly answered, "it's mere probability, and without any over-all pattern." "Not quite. It has a center. Alec is the center." think this silly of me," she went on to McGill, "but why isn't it something like an overactive poltergeist?" "Pure concept," he said. "No genuine evidence." "Magnetism?" all you'd get would be stored kinetic energy, such as when a piece of there, like a rundown clock weight. These things do a lot more than that—they go on moving." "Only an analogy," said McGill. "A crystal resembles life in that it has a definite shape and exhibits growth, but that's all. I'll agree this—thing—has no discernible shape and motion is it merely rearranges it into a non-random pattern. In this case, it's rearranging random motions and it has a nucleus and it seems to be growing—at least in what you might is it? What's it made of?" "I should say it was made of the motions. There's a similar idea about the atom. Another thing that's like a crystal is that it appears to be forming around a nucleus not of its own material—the way a speck of sand thrown into a supersaturated solution becomes the nucleus of crystallization." "Sounds like the pearl in an oyster," Molly said, and gave me an impertinent look. "Why," I asked McGill, "did you say the coins couldn't have the same date? I mean apart from the off chance I got them that way." "Because I don't think this thing got going before today and repairman. He took the set apart and clucked like a hen. "I guess you dropped it on the floor, mister," he said with strong disapproval. "Certainly not," I said. "Is it broken?" "Not exactly broken , but—" He shook his head and took it apart some more. McGill went over and they discussed the problem in undertones. Finally the man left and Molly called her mother to reassure her. McGill tried to explain to me what had happened with the phone. "I'm in no mood to cook," she said. "Let's get away from all this." McGill raised an eyebrow. "If all this, as you call it, will let us." In the lobby, we ran into Nat, looking smug in a journalistic way. "I've been put on the story—who could be better?—I live here. So far, I don't quite get what's been happening. I've been talking to Danny, but he didn't say much. I got the feeling he thinks you're involved in some mystical, Hibernian way. Hello, McGill, what's with you?" "He's got a theory," said Molly. "Come and eat with us and he'll tell you all about it." Since we decided on an air-conditioned restaurant nearby on Sixth I had the impression that the shaker had frozen solid. Well, ice is a "Hey! What's the idea?" snarled the sour-looking man.

<question>:
Who is the nucleus?

<options>:
A Alec
B Mrs. Graham
C A character never mentioned by name
D McGill

<answer>:

A