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

<passage>:
By FRANK M. ROBINSON Illustrated by DON SIBLEY to spend two years there." You're afraid the glamor would wear off and you would get to hate it on Venus." The very young man nodded miserably. "I guess that's it." be staffed by couples. That is, of course, as soon as it's practical." "It might be—but sometimes it's sooner than you think. And the goal is worth it." 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. and canned air until your insides felt as though they were plated 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! " his face. "They wanted me to stay until the next relief ship lands," Chapman whispered back. "What did you say?" He shrugged. "No." "You kept it short," somebody else whispered. It was Donley, up and sitting on the side of his hammock. "If it had been me, I would have told them just what they could do about it." The others were awake now, with the exception of Dahl who had his face "Well, don't let it throw you. They've never been here on the Moon. " All "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." for breakfast duty. The others started lacing up their bunks, getting ready for their last day of work on the Moon. In a few hours they'd be relieved by members of the Third research group and they'd be on their way back to Earth. And that includes me, Chapman thought. I'm going home. I'm finally shot across the crater floor. The rest of it was still blanketed in That's what happened to guys like Dixon, Chapman thought. On the Moon, Bening were struggling into their suits, getting ready to go outside. "Think we ought to radio the space station and see if they've left "I talked to them on the last call," Chapman said. "The relief ship left there twelve hours ago. They should get here"—he looked at his watch—"in about six and a half hours." "Chap, you know, I've been thinking," Donley said quietly. "You've been here just twice as long as the rest of us. What's the first thing you're going to do once you get back?" of that. I suppose none of us have. We've been like little kids who have waited so long for Christmas that they just can't believe it when it's finally Christmas Eve." Klein nodded in agreement. "I haven't been here three years like you you going to do?" "Nothing very spectacular," Chapman said, smiling. "I'm going to rent a room over Times Square, get a recording of a rikky-tik piano, and They were quiet. "I thought all members of the groups were supposed to be single," Donley said. when he had landed with the First group. The record was old and the just starting to sink in. "You know, Chap," Donley said, "it won't seem like the same old Moon too much. The party quieted down after a while and Dowden and Bening finished Donley looked sour. "I've gone out at least five hundred times," he said, "and you check me each time." "And I'd check you five hundred more," Chapman said. "It takes only through one of those and that's it, brother." Donley sighed. "Chap, you watch us like an old mother hen. You see we check our suits, you settle our arguments, you see that we're not bored Only Klein and Chapman were left in the bunker. Klein was at the work of people. Bad people and good people and fat people and thin people, "Yes." "You're not like Dahl. You've never mentioned it." Chapman was at the port again, staring out at the bleak landscape. "We Being on the Moon was the opportunity of a lifetime. He thought so much "Yes. It worked fine, too. We heard everything that went through his mind at the end." somebody have to stay for stopover?" "Hell, lots of reasons, Julius. You can't get a whole relief crew and 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 when the first relief ship came." 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." 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 But it wasn't like going home unless you packed. It was part of the ritual, like marking off the last three weeks in pencil on the gray steel of the bulkhead beside his hammock. Just a few hours ago, when he woke up, he had made the last check mark and signed his name and the to the Moon. sweat and his eyes were frightened. He moistened his lips slightly. "Do—do you think they'll ever have relief ships up here more often than every eighteen months, Chap? I mean, considering the advance of—" "No," Chapman interrupted bluntly. "I don't. Not at least for ten years. The fuel's too expensive and the trip's too hazardous. On 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!" something. It still didn't add, not quite. "You know I don't like it here any more 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. "If you have any report to make, I think you had better get at it," he cut in, keeping all the harshness he felt out of his voice. "It'll be too late after the relief ship leaves. It'll be easier to give the captain your report than try to radio it back to Earth from here." all three started for the lock. softly. "Just be sure to check." "Oh, what the hell, Chap!" Donley started angrily. Then he shut up and only half a mile to the relief rocket, so somebody would probably have port of the rocket had opened and tiny figures were climbing down the ladder. The small figures from the bunker reached them and did a short the bunker, taking off their suits. The newcomers were impressed and group had been when they had landed. Like Chapman had been in the First. Donley and the others were all over them. How was it back on Earth? Who had won the series? Was so-and-so still foot square and six inches deep. Chapman watched him curiously. "Well, I'll be damned!" Klein said. "Hey, guys, look what we've got here!" held out his hand and said, "My name's Eberlein. Captain of the relief "I hadn't heard of them." "Oh, yes, big plans "That's it?" Chapman asked. Eberlein frowned. "Well, the Commission said they'd be willing to captain. I'm sorry, but I'm afraid that you'd have to stay up here to appreciate that.

<question>:
How many people were living on the moon before the relief ship arrived?

<options>:
A 5
B 4
C 6
D 7

<answer>:

C