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

<passage>:
He was glad when the official greeting was over. He was a very tired man he would talk. almost rebuilt the entire outside and grounds. But he was sorry. He had wanted it to be as before. He was glad. He'd had enough of strangers. Not that he was through with didn't grow much while you were gone, Dad, Mom says I don't eat enough." So he put him down and told himself that it would all change, that down beside him—but she had hesitated. He had hesitated. His wife had hesitated before sitting down beside him. Edith said, "He made top forum the six-month period before vacation, and he made top forum the six-month period you went away, Hank." He nodded, remembering that, remembering everything, remembering the warmth of her farewell, the warmth of Ralphie's farewell, their tears as They had been right to worry. He had suffered much after that blow-up. tired. I'd like to lie down a while." Which wasn't true, because he'd been lying down all the months of the way back. She said, "Of course. How stupid of me, expecting you to sit around and they wouldn't let him to get up on time when you were stationed at the base outside of town. "Not this bed," he murmured, and was a little sorry afterward. Which was not what he'd considered at all important on leaving Walter Reed Hospital early this morning which was something he found distasteful, something he felt beneath them both. And, at the same time, He was tired of thinking. He lay down and closed his eyes. He let But sometime later, as he was dozing off, a sense of reassurance began communicate this, the strangeness would disappear and the First One would again become good old Hank. It was little enough to ask for—a return to old values, old relationships, the normalcies of the backwash instead of the freneticisms of the lime-light. It would certainly be He slept. talkativeness, and Ralphie had always chosen mealtimes—especially with he'd said it many many times no one indicated in any way that a woman was sobbing at the table. "Still going like sixty. We'll sell out before—" At that point he looked at Hank, and Hank nodded encouragement, desperately interested in this normalcy, and Joe's voice died away. He looked down at his plate, mumbled, "Soup's getting cold," and began to eat. His hand shook a little his ruddy face was not quite as ruddy as Hank remembered it. Hank looked at Edith Edith was busy with her plate. Hank looked at Ralphie was busy with his plate. Hank looked at Joe Joe was chewing, gazing out over their heads to the kitchen. Hank looked at of, that he could have smashed more than a table. Edith said, "Hank!" He said, voice hoarse, "Shut up. Go away. Let me eat alone. I'm sick of the lot of you." down his throat. Mother said, "Henry dear—" He didn't answer. She began to cry, and he was glad she left the house then. He had never said the time. Joe merely cleared his throat and mumbled something about and he, too, was gone. Lucille never did manage to speak to him. hesitated near his chair, and when he made no comment she called the Ralphie's head dropped and he muttered, "Aw, no, Dad." Edith said, "He'll stay home, Hank. We'll spend an evening together—talking, watching TV, playing Monopoly." Ralphie said, "Gee, sure, Dad, if you want to." Hank stood up. "The question is not whether I want to. You both know I was going to his room because he was, after all, very tired and would in all probability continue to be very tired for a long, long time and that He fell asleep quickly, lying there in his clothes. and it seemed her old smile. "They're so anxious to see you, Hank. I could barely keep Phil from coming up and waking you himself. They want to go out and do the town. Please, Hank, say you will." It didn't turn out that way. He was disappointed full of jokes. He patted Edith on the head the way he always had, and clapped Hank on the shoulder (but not the way he always had—so much more gently, almost remotely), and insisted they all drink more than was good for them as he always had. And for once, Hank was ready to go along on the drinking. For once, he matched Phil shot for shot, beer for beer. and Hank went right on drinking. Edith said something to him, but he merely smiled and waved his hand and gulped another ounce of nirvana. At midnight, he was still drinking. The others wanted to leave, but he They were on the dance floor. He held her close, and hummed and chatted. And through the alcoholic haze saw she was a stiff-smiled, stiff-bodied, mechanical dancing doll. Hank said, "First one dance with my loving wife." Phil's car, Rhona driving because Phil had drunk just a little too much, Phil singing and telling an occasional bad joke, and somehow not his old self. No one was his old self. No one would ever be his old self with while longer, not yet aware of his supposed "You know why?" he repeated, turning to the back seat, the laughter rumbling up from his chest. "You know why, folks?" Hank said, "No, Phil, why is it the most popular place on earth?" Phil said, "Because people are—" And then he caught himself and waved his hand and muttered, "I forgot the punch line." "Because people are dying to get in," Hank said, and looked through the The car was filled with horrified silence when there should have been nothing but laughter, or irritation at a too-old joke. "Maybe you should let me out right here," Hank said. "I'm home—or that's what everyone seems to think. Maybe I should lie down in an open grave. Maybe that would satisfy people. Maybe that's the only way to act, like Dracula or Edith said, "Oh, Hank, don't, don't!" and entered the house. "Hank," Edith whispered from the guest room doorway, "I'm so sorry—" "There's nothing to be sorry about. It's just a matter of time. It'll all work out in time." "Yes," she said quickly, "that's it. I need a little time. We all need a little time. Because it's so strange, Hank. Because it's so frightening. I should have told you that the moment you walked in. I think I've hurt "I'm going to stay in the guest room," he said, "for as long as necessary. For good if need be." "How could it be for good? How, Hank?" That question was perhaps the first firm basis for hope he'd had since all they possibly can from now on. Every time a young and healthy man loses his life by accident, by violence, and his body can be recovered, he'll go into the tanks and they'll start the regenerative brain and organ process—the process that made it all possible. So people have to get used to us. And the old stories, the old terrors, the ugly old us because in time it'll be an ordinary thing." Edith said, "Yes, and I'm so grateful that you're here, Hank. Please believe that. Please be patient with me and Ralphie and—" She paused. "I saw nothing," he said. "It was as if I slept those six and a half months—slept without dreaming." Later, half asleep, he heard a dog howling, and remembered stories of pulled the covers closer to him and luxuriated in being safe in his own home. THE END

<question>:
Why was Hank lying down for months?

<options>:
A Hank's body was lying in a cryostasis tank while the doctors figured out how to bring him back to life.
B Hank was lying in a stasis tank on the way back from the moon.
C Hank was lying in a stasis tank on the way back from Mars.
D Hank's body was lying in a tank designed to regenerate his body processes.

<answer>:

D