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

<passage>:
play cards with a stranger. The stranger might be me. Where there are degenerate card players around, I sometimes get a call. Not dice—I My partner was a fellow named Henry. He had an electronic surplus hardware business, but business wasn't good and he was looking for a little extra cash on the side. It turns out that the other little wholesalers in the loft building where he has his business are all card players, and no pikers, either. So Henry spread the word that he was available for a gin game—any time at all, but he would only play in his own place—he was expecting an important phone call and he but the card players did. I was supposed to be his stock clerk. While Henry and the other fellow were working on the cards at one end of the room, I would be moving around the other—checking the stock, packing the stuff for shipment, worker, busy every second. I had to be. In order to see the man's hand I had to be nearby, but I had to keep moving so he wouldn't pay attention to me. And every time I got a look at his hand, I pushed the little button on the transmitter in my pocket. time when he didn't. It got so the customers were looking at him with a lot of dislike, and that was bad for business. So I called him out into the hall. "Skippy," I said—that's what we called him, "lay off. Never take his money." He ran his fingers back along his hair. "Can't a fellow express have to. I'd express him myself—express him right out of our setup. But before I got a chance, this fellow from Chicago came in, a big manufacturer named Chapo didn't like an audience. Henry looked at us miserably. But what was he going to do? If he didn't go along, the word could spread that maybe there was something wrong going on. He had to play. "Take the day off, you two," he said, but he Henry a wink and a nod toward the window. Then I took Skippy by the elbow and steered him out of there. Down in the street I said, fast: "You want to earn your pay? You have to give me a hand—an eye is really what I mean. Don't argue—just say yes or no." The desk man in the scratch house looked up from his comic book. "A room," I said. "Me and my nephew want a room facing the street." And I Because we still had a chance. With the field glasses and Skippy's got into the room and I laid it out for Skippy. "You aim those field glasses out the window," I told him. "Read Chapo's cards and let me know that's all. I'll take care of the rest." right, I was getting them out to Henry. I felt pretty good. I even began to feel kindly toward the kid. At my age, bifocals are standard equipment, but to judge from Skippy's fast, After about an hour, Skippy put down the glasses and broke the news: the game was over. We took our time getting back to Henry's place, so Chapo would have time to clear out. Henry greeted us with eight fingers in the air. Eight hundred? But before I could ask him, he was already talking: "Eight big ones! Eight thousand bucks! And how you did it, I'll never When I turned around to look for Skippy, to ask him some questions, he was gone. Evidently he didn't want to answer. I beat up and down every block in the neighborhood until I spotted him in a beanery, drinking a cup of coffee and looking worried. I sat down beside him, quiet. He didn't look around. The counterman opened his mouth to say hello. I shook my head, but Skippy said, "That's all right. I know you're there." came before that." I said, "You can always quit," but then stopped. Because it was a lie. He couldn't quit—not until I found out how he read Chapo's cards through a drawn shade. surprise me." "What are you talking about?" "I can hear every word that's on Henry's mind," he said somberly. "All my life," said Skippy, "I've been hearing the voices. It doesn't they don't want me to. Field glasses? I didn't need field glasses. I could hear every thought that went through Chapo's mind, clear across the street. Henry too. That's how I know." He hesitated, looking at me. I said, "Prove it." The kid finished his coffee. "Well," he said, "you want to know what the counterman's got on his mind?" He leaned over and whispered to me. I yelled, "That's a lousy thing to say!" Everybody was looking at us. He said softly, "You see what it's like? I don't want to hear all this stuff! You think the counterman's got a bad mind, you ought to listen in on Henry's." He looked along the stools. "See that fat little woman down at the end? She's going to order another cheese Danish." He hadn't even finished talking when the woman was calling the counterman, and she got another cheese Danish. I thought it over. What he said about Henry holding out on me made it real serious. I had to But I didn't like Skippy's idea of proof. He offered to call off what everybody in the beanery was going to do next, barring three or four he said were silent, like me. That wasn't good enough. "Come along with me," I told him, and we took off for Jake's spot. That's a twenty-four-hour place and the doorman knows me. I knew Jake and I knew his roulette wheel was gaffed. I walked right up to the wheel, and whispered to the kid, "Can you read the dealer?" He smiled and nodded. "All right. Call black or red." The wheel spun, but that didn't stop the betting. Jake's hungry. In his place you can still bet for a few seconds after the wheel starts turning. When Skippy said black, I put the fifty on red. Black won it. a chance! It was going to be Skippy and me, all the way. Not only didn't even have to spend for batteries. Card games, gaffed wheels, everything. Down at the track he could follow the smart-money guys And think of the fringe benefits! With Skippy giving the women a I could understand a lot about Skippy now—why he didn't like most And then, take away the voices in his head, and Skippy didn't have much rooming house where I'd told him to wait, to get going on the big time. However, Henry had more brains than Skippy. I hadn't told Henry who tipped me off, but it didn't take him long to work out. After all, I had told him I was going out to look for Skippy, take much brains. All he had to do was come around to Skippy's place So when I walked in the door, Skippy was there, but he was out cold, help a fine Swiss watch by pounding it on an anvil. Skippy could walk and talk all right, but something was missing. "The voices!" he yelled, I got a quick attack of cold fear. "Skippy! What's the matter? Don't Like I say, I'm a genius. Skippy wouldn't lie to me he's not smart enough. If he says he hears voices, he hears voices. Being a genius, my theory is that when Henry worked Skippy over, he jarred his tuning strips, or whatever it is, so now Skippy's receiving on another frequency. Make sense? I'm positive about it. He sticks to get them. Like what he tells me about the people—I guess because I have to get Skippy back in business. old neighborhood, but I haven't set up another partner for taking the card players. That seems like pretty small stuff now. And I don't talk to Henry when I see him. And I never go in the beanery when that counterman is on duty. I've got enough troubles in the world I don't have to add to them by associating with

<question>:
How did Skippy prove his powers to the protagonist?

<options>:
A By telling him his thoughts
B By calling the outcomes of a roulette game
C By cheating at the card games
D By telling him people's orders at the coffee shop

<answer>:

B