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

<passage>:
that psychologists and research men agree that research stations should be staffed by couples. That is, of course, as soon as it's practical." "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 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. 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 tomorrow with none of the modern conveniences, a charming place where fit of bureaucratic rage. Chapman stuffed a rag under it and ignored 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 they were still asleep, making the animal noises that people usually make in slumber. Dowden, half in the bottom hammock and half on the floor, was snoring peacefully. Dahl, the poor kid who was due for stopover, was mumbling 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 idea of heaven. Donley and Bening were lying perfectly still, their covers not mussed, sleeping very lightly. Lord, Chapman thought, I'll be happy when I can see some other faces. "What'd they want?" Klein had one eyelid open and a questioning look on 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 to the bulkhead and a pillow over his head. Dowden rubbed his eyes sleepily. "Sore, aren't you?" "Kind of. Who wouldn't be?" "Well, don't let it throw you. They've never been here on the Moon. "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." and walked noiselessly over to the small electric stove. It was his day 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 morning—the Moon's "morning"—and he shivered slightly. The rays of Black Hills of Dakota look like paradise. That's what happened to guys like Dixon, Chapman thought. On the Moon, Donley was warming himself over his cup, looking thoughtful. Dowden and Bening were struggling into their suits, getting ready to go outside. Dahl was still sitting on his hammock, trying to ignore them. "Think we ought to radio the space station and see if they've left you're going to do once you get back?" It hit them, then. Dowden and Bening looked blank for a minute and blindly found packing cases to sit on. The top halves of their suits were still hanging on the bulkhead. Klein lowered his coffee cup and are 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 drink and listen to the music and watch the people on the street below. thought. They were going to go home in a little while and the idea was just starting to sink in. The party quieted down after a while and Dowden and Bening finished getting into their suits. They still had a section of the sky to map Chapman stopped them at the lock. "Remember to check your suits for leaks," he warned. "And check the valves of your oxygen tanks." Donley looked sour. "I've gone out at least five hundred times," he But he checked his suit for leaks and tested the valve of his tank before he left. Only Klein and Chapman were left in the bunker. Klein was at the work table, carefully labeling some lichen specimens. "I never knew you were married," Chapman said. hope to." "Settle down in a small cottage and raise lots of little Chapmans, eh?" Chapman nodded. "That's the only future," Klein said. Being on the Moon was the opportunity of a lifetime. He thought so much ropes, you have to watch them to see that they stay alive in spite of themselves. The Moon's a new environment and you have to learn how to live in it. There's a lot of things to learn—and some people just 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 enjoyed one of his relatively few moments of privacy. He wandered over to his bunk and opened his barracks bag. He checked the underwear and 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 of the bag and locked it. They should never have sent a kid like Dixon to the Moon. He had just locked the bag when he heard the rumble of the airlock and the soft hiss of air. Somebody had come back earlier than expected. He watched the inner door swing open and the spacesuited figure clump in "Well, yes, more or less. Oh, God, Chap, I know you want to go home! But I couldn't ask any of the others 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!" company!" He dashed for his suit. Dowden and Bening piled after him and all three started for the lock. Chapman was standing in front of it. "Check your suits," he said softly. "Just be sure to check." Chapman and Klein watched them dash across the pumice, making the tremendous leaps they used to read about in the Sunday supplements. The 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 noticed one—it was probably Donley—pat the ship affectionately before he started back. They were in the lock and the air pumped in and then they were in the bunker, taking off their suits. The newcomers were impressed and solemn, very much aware of the tremendous responsibility that rested on their shoulders. Like Donley and Klein and the members of the Second 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!" of walking on it and lying on its cool thickness during those sultry summer nights when it was too hot to sleep indoors. privately?" They walked over to one corner of the bunker. "This is about as private as we can get, captain," Chapman said. "What's on your mind?" Eberlein found a packing crate and made himself comfortable. He looked "Oh, yes, big plans . They're working on unmanned, open-side rockets now that could carry cargo and sheet steel for more bunkers like this. Enable us to enlarge the unit, have a series of bunkers all linked together. Make good laboratories and living quarters for you people." His eyes swept the room. "Have a little privacy for a change." Chapman nodded. "They could use a little privacy up here." imagine any man would like being here all the time. They're prepared to

<question>:
What are the living conditions of the astronauts on the moon?

<options>:
A It’s almost the same at their life on Earth
B They are able to grow food
C They have artificial gravity in their living quarters
D They sleep strapped into vertical beds

<answer>:

C