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

<passage>:
about things like smoking." The very young man was annoyed. "I don't think I want to go," he blurted. "I don't think I would care to spend two years there." The older man blew a smoke ring and watched it drift toward the air exhaust vent. "But that might be a long time!" the very young man protested. "It might be—but sometimes it's sooner than you think. And the goal is worth it." to himself. Chapman stared at the radio key. Three years on the Moon and they didn't want him to come back. Three years on the Moon and they thought he'd be glad to stay for more. Just raise his salary or give him a bonus, the every-man-has-his-price idea. They probably thought he liked it there. Oh, sure, he loved it. Canned coffee, canned beans, canned pills, and canned air until your insides felt as though they were plated with tin. Life in a cramped, smelly little hut where you could take you couldn't take a shower, couldn't brush your teeth, and your kidneys didn't work right. And for double his salary they thought he'd be glad to stay for another year and a half. Or maybe three. He should probably be glad he had the opportunity. The key started to stutter again, demanding an answer. He tapped out his reply: " No! " it. He turned to the hammocks, strung against the bulkhead on the other side of the room. The chattering of the key hadn't awakened anybody to himself. Julius Klein, with that look of ineffable happiness on his face, looked as if he had just squirmed under the tent to his personal "What'd they want?" Klein had one eyelid open and a questioning look on his face. "They wanted me to stay until the next relief ship lands," Chapman whispered back. "What did you say?" man to stay on the job a while longer." " "They think you've found a home here," Donley said. "Why the hell don't you guys shut up until morning?" Dahl was awake, looking bitter. "Some of us still have to stay here, you know. Some of us aren't going back today." No, Chapman thought, some of us aren't going back. You aren't. And Dixon's staying, too. Only Dixon isn't ever going back. Klein jerked his thumb toward Dahl's bunk, held a finger to his lips, and walked noiselessly over to the small electric stove. It was his day day of work on the Moon. In a few hours they'd be relieved by members And that includes me, Chapman thought. I'm going home. I'm finally going home. He walked silently to the one small, quartz window in the room. It was That's what happened to guys like Dixon, Chapman thought. On the Moon, to the expedition. Then I think I'll go home and see my wife." They were quiet. "I thought all members of the groups were supposed to be single," Donley said. "They are. And I can see their reasons for it. But who could pass up They ran through it twice. They were beginning to feel it now, Chapman thought. They were going to go home in a little while and the idea was just starting to sink in. You found a home here." The others chimed in and Chapman grinned. Yesterday or a week ago they couldn't have done it. He had been there too long and he had hated it too much. "The blue sky and the green grass and trees with leaves on them that turn color in the Fall. I think, when I go back, that I'd like to go "Settle down in a small cottage and raise lots of little Chapmans, eh?" Chapman nodded. "That's the only future," Klein said. "Chap." Klein hesitated a moment. "What happened to Dixon?" "He died," Chapman said. "He was a good kid, all wrapped up in science. Being on the Moon was the opportunity of a lifetime. He thought so much about it that he forgot a lot of little things—like how to stay alive. The day before the Second group came, he went out to finish some work mind at the end." Klein's face was blank. "What's your real job here, Chap? Why does somebody have to stay for stopover?" stay over, I volunteered. I thought the others were so important that it was better they should take their samples and data back to Earth wouldn't make any difference to me. I'm sorry if Dahl is young. So was I. I've lost three years up here. And I don't intend to lose any more." Klein held up his hands. "Look, Chap, I didn't mean you should stay. I know how much you hate it and the time you put in up here. It's just—" his toothbrush and shaving kit for maybe the hundredth time and pushed the clothing down farther in the canvas. It was foolish because the bag was already packed and had been for a week. He remembered stalling it off for as long as he could and then the quiet satisfaction about a its meager belongings to the bag. He hadn't actually needed to pack, of course. In less than twenty-four hours he'd be back on Earth where he could drown himself in toothpaste and buy more tee shirts than he could wear in a lifetime. He could leave behind his shorts and socks and the outsize shirts he had date. His signature was right beneath Dixon's. He frowned when he thought of Dixon and slid back the catch on the top of the bag and locked it. They should never have sent a kid like Dixon to the Moon. together." Chapman didn't look. "She—we—expected to be married when I got back. I never told her about stopover, Chap. She thinks I'll be home tomorrow. I kept thinking, hoping, that maybe somehow—" He was fumbling it badly, Chapman thought. "You wanted to trade places with me, didn't you, Bob? You thought I might stay for stopover again, in your place?" trying desperately to stop what he was about to do, but just couldn't help himself. "Well, yes, more or less. Oh, God, Chap, I know you want to go home! But I couldn't ask any of the others you were the only one who could, the only one who was qualified!" one of the Ivy League schools. Father was a manufacturer of stoves or something. It still didn't add, not quite. "You know I don't like it here any more than you do," Chapman said slowly. "I may have commitments at home, too. What made you think I would change my mind?" Dahl took the plunge. "Well, you see," he started eagerly, too far gone to remember such a thing as pride, "you know my father's pretty well fixed. We would make it worth your while, Chap." He was feverish. "It would mean eighteen more months, Chap, but they'd be well-paid months!" Chapman felt tired. The good feeling he had about going home was slowly evaporating. company!" He dashed for his suit. Dowden and Bening piled after him and all three started for the lock. Donley and the others were all over them. How was it back on Earth? Who had won the series? Was so-and-so still teaching at the university? What was the international situation? Was the sky still blue, was the grass still green, did the leaves still they'd like to see you stay. They feel if they're going to enlarge it, add more bunkers and have more men up here, that a man of practical experience should be running things. They figure that you're the only consider anything else you had in mind, if it was more money or...." "The answer is no," Chapman said. "I'm not interested in more money for staying because I'm not interested in staying. Money can't buy it, captain. I'm sorry, but I'm afraid that you'd have to stay up here to appreciate that. "Bob Dahl is staying for stopover. If there's something important about the project or impending changes, perhaps you'd better tell him before you go."

<question>:
Why was Dixon staying longer on the moon?

<options>:
A He was dead
B He would stay longer for double his salary
C He would stay in Chapman's place
D He wanted to stay forever

<answer>:

A