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

<passage>:
Dwindling Years He didn’t expect to be last—but neither did he anticipate the horror of being the first! something inside him had been forcing him to make this decision. And maybe it would do no good. thirty years was a number a man could risk. If he made it, though.... Well, he’d see those grandchildren of his this year—and Harry. Maybe he’d even tell Harry the truth, once they got done celebrating the reunion. And there’d be other grandchildren. With the ship, he’d have time for breath and feeling his heart hammering in his chest. enough to look them up. Plenty He’d been a fool to come to work, was more important. It hadn’t been a joke about his growing old, after all. But now, in a few days, he’d be his old—no, of course not—his young self again! He resented every second of it. It was as if the almost forgotten specter of age stood beside him, counting the seconds. But at last they were through and he was led into the quiet rejuvenation room, Somewhere in every human brain lay the memory of what his cells had been like when he was young. Or perhaps it lay in the cells the first hope they’d found that the century-long trips between stars in the ponderous shuttles might be ended and he should have been filled with excitement alive. Giles dropped the report wearily job. He stretched experimentally, with the eternal unconscious expectation that he would find himself suddenly young passed the drastic birth limitation avoid the compulsory emigration draft and stay on with his mother. It had been the bitter quarrels over that which had finally broken Giles’ fifth marriage. act and his mother had spoiled him. He’d even tried to being married on the way or his dozen children, but filled most of the frame with glowing description and a plea for his against the background of an alien but attractive world. He had no desire to spend ninety years cooped up with a bunch of callow young emigrants, of his profession. “We haven’t lost a patient in two hundred years, to my knowledge.” he should give up his work. The discovery that men could live practically forever had put an end to most family ties sentiment wore thin in half a century—which now, though it had once seemed long enough. once—something about the years dwindling down. He groped for recovered, he could still sense the glances of the others, as if he a family. Giles had been living here for nearly a century now and he’d never regretted it. But tonight his own group irritated him. had no wish to talk until he could study the final report. He gave up at last and went to his own suite. What he needed was a good night’s sleep after a little relaxation. Even that failed him, though. He’d developed one of the finest he’d developed through the years helped to add to the richness of living now. He gave it up and went to bed—to have the fragment of that of truth in it, unfortunately. “They’ll slow up when their populations fill,” Giles repeated the Earth fit for our longevity. We can wait. We’ll have to.” or other. Could they really dwindle down? Suppose he couldn’t rejuvenate all the way? He knew THE YOUNGER man stared about thirty, instead of the normal early twenties. Would that reduce the slice of eternity that rejuvenation meant? And what had happened to Sol? centuries, if we can ever master it. Even with Sirius expecting the missiles and ready to cooperate. Procyon in two weeks. We even know life can stand the trip. The morning. Drat it, maybe he should move out. Maybe trying family life again would give him some new interests. Amanda probably would be willing to marry “In the spring, a young man’s then shuddered. It hadn’t been that kind of spring for him—not this rejuvenation nor the last, nor the one before that. Or how about you? Do you really want to risk losing the rest of your life rather than waiting a couple more centuries until we know it’s safe? If you do, I’ll order the big ship.” for his fear, it seemed to vanish, leaving a coldness that numbed him. slowly. The belligerence ran out answer. NO SANE man would risk a chance for near eternity against such a relatively short wait. Heroism had belonged to those who knew their days were of him. for it. They couldn’t risk that plan for short-term benefits. Usually it was too easy to realize that, and the sight of the solid, time-enduring buildings outside should have given him a sense of security. Today, though, nothing seemed to help. He felt choked, imprisoned, somehow lost the city beyond you won’t be the last, if that’s any consolation. We’ve got a longer time scale than we used to have—but it’s in centuries, not in eons. For everybody, not just you.” It was no consolation. Giles nodded mechanically. “I won’t We can fix the heart and all the rest. You’ll be in good physical condition, better than your grandfather—” “And then....” Giles couldn’t pronounce the words. He’d grown old and he’d grow older. And eventually he’d die! An immortal man had suddenly found death hovering on his trail. The years had dwindled and gone, and only a few were left. stop twice to catch his breath and fight against the pain that He stood up, holding out his he meant it. The man had done all he could and had at least saved him the suspense of growing doubt and horrible eventual discovery. OUTSIDE ON the street, he hand. “Thank you, Doctor,” he eternity was no longer a part of him. Even his car would outlast him. moment, though, he’d slipped back into the old ways. He climbed into it, still partly GILES FOUND himself lying arise. Those wouldn’t matter much now. For a man who had thought of living almost forever, thirty years was too short a time to count. almost himself again. After all, there was nothing to worry about from his panic to leave him Earth’s doctors could cure anything. and he drove on. What else was there for him? There, at least, he could still fill his time with work—work that might even be useful. morose man the last few times he’d seen him, but that could hardly explain his taking a twenty-year In the future, men would shuttle trip for such a still, even if he could never see its finish. It would be cold comfort but it was something. And he might keep busy enough to forget sometimes that the years were gone for him. Automatic habit carried him slim reason. It was no concern of “As all right as I’ll ever be,” he told her. “They tell me I’m just growing old.” on, he’d be missing the old days when he’d had a mansion and counted his wealth in possessions, instead of the treasures he could build inside himself for the future with the members. For the past, Harry had driven him around. Now he’d taken to walking, as so many others had, for a small chance of some accident and nobody had any desire to spend the long future as a cripple. he’d never seen even pictures of his other grandchildren. Family ties melted away too fast for interstellar “I’ll wait for you, sir,” Dubbins travel. Yet there seemed to be no slackening of them in Harry’s group. A very pleasant family in a very pleasant world. He read Harry’s note again, with its praise for the planet and its invitation. He wondered if Then abruptly the line finished itself. “The years dwindle down to a precious few....” he remembered. “A precious few.” Those dwindling years had been precious once. He unexpectedly recalled his own grandfather holding him on an old knee and slipping him candy that was forbidden. The years seemed precious to the old man then. on impulse, he set it back to the picture, studying the group again

<question>:
Why does Gile volunteer for the ship in the end?

<options>:
A He hasn’t accepted his  mortality, and is trying to make up for it with an act of heroism.
B He knows that no one else will volunteer, and feels responsible to do so.
C He fears the end of his life, and wants to try to see his family before he passes.
D He accepts his mortality, and is willing to spend his last years on the chance to see his family.

<answer>:

D