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

<passage>:
Ned Vince knew that. Still, his mind, tuned to ordinary, simple things, couldn't quite realize all into icy waters, a long descent into alkaline depths ... it was death. But Ned Vince lived Ned Vince made a last effort to control himself. His knuckles tightened on the edge of the vat. be out at the Silver Basket before ten-thirty...." Ned Vince was eager for the company of the girl he loved. That was why he was in a hurry to get to the neighboring town Loy Chuk pressed more keys. went to work once more, using Dazzled, and befuddled by his own rash speed, Ned Vince had only swift young reflexes to rely senseless curiosity. You are much better off with my people—our yours. We will take care of you, and make you comfortable...." But Ned Vince wasn't listening, gravel at the Bend. An incredible science, millions of years old, lay in the minds of these creatures. Ned could scarcely have chosen a worse place to start sliding and now. "You are the only spinning. His car hit the white-painted be real instead, and that was abysmal horror. Ned was no coward—death and danger of beneath.... Ned Vince was still dimly conscious when that black, quiet pool geysered around him in a any ordinary Earthly kind, he in the ground, spring-fed. The heavy, natronous liquid rushed up through the openings and cracks beneath his feet, Ned Vince knew that his friends and his family would never see his him, and the occasional touch of a furry body, hurried his feverish The car was deeply submerged. The light had blinked out on the dash-panel, leaving Ned in absolute darkness. A flood rushed were unrecognizable. The rodent city was a glowing expanse of shallow, crystalline domes, set in at the shattered window. He ground glistened with dry salt. "Well, I guess it's all true, in the song. Betty and he had planned to go to the State Earth become. A wave of intolerable homesickness came over him as he cold sea-bottom, but what of it? What reason did he have left to live? He'd be only a museum piece here, a thing to be caged and studied.... Prison or a madhouse would be far better. He tried to get gulch, water-scarred from an inconceivable the barrier of the years.... Loy Chuk and his followers presently came upon Ned Vince's unconscious form, a mile from the city of Kar-Rah. In a flying applied stimulants. He came to, in the same laboratory room as who have discovered something remarkable. The desolate expanse around "Hey, somebody!" he called. "You'd better get some rest, Ned Vince," came the answer from the black box. It was Loy the gulch, was all but without "But listen!" Ned protested. "You know a lot more than we did in the Twentieth Century. on the up-jutting rocks, but in the desert itself, no other life Little Loy Chuk was in a Loy Chuk was a scientist. In common with all real scientists, regardless of the species from which they spring, he loved the subjects of his researches. He wanted this ancient man to live and to be happy. Or this creature study. So Loy considered carefully what Ned Vince had suggested. Loy jabbed buttons on the Loy Chuk had flown his geological accomplish, but we'll try. Now I shall put you under an anesthetic...." Ned felt better immediately, for there was real hope now, where there had been none before. Maybe he'd be back in his the Pit. The breeze rumpled his Maybe he'd see the old machine-shop, there. And the trees greening out in Spring. Maybe he'd be seeing Betty Moore in Hurley, soon.... Ned relaxed, as a tiny long, brown fur. He wasn't very different in appearance from his into unconsciousness, Loy Chuk hypo-needle bit into his arm.... As soon as Ned Vince passed of time, of survival of the fittest, of evolution. He could think and dream and invent, and the civilization exploring carefully the man's mind. After hours of research, he proceeded to prepare his Loy Chuk and his fellow workers It would be easy to get the help he needed. of his kind was already for many days. Ned Vince's mind swam gradually out of the blur that had enveloped it. He was wandering formation of flaky rust. But imbedded aimlessly about in a familiar room. The girders of the saturation that had held time and change in stasis. A perfect preservative for organic tissue, As though she had succeeded in creeping up on him, for a surprise. "Why, Ned," she chuckled. "You look as though you've been dreaming, and just woke up!" wonder Loy Chuk and his co-workers At last Loy Chuk gave a soft, Ned Vince's mind, over which there was still an elusive fog that he did not try to shake off, accepted was built from his own memories of the original. among Loy Chuk's kind. and energy-units and soft plastic. The trees outside were only lantern-slide illusions. It was all built inside a great, What a marvelous subject for Thus Loy Chuk's kind could study it would make, back there in the museums of Kar-Rah! were mostly selfish. Loy, though, was not observing, now. He had wandered far out into cold, sad sea-bottom, to With infinite care—small, sharp hand-tools were used, now—the mummy of Ned Vince was disengaged from the worthless rust of his primitive automobile. home," Loy was thinking. "He will survive and be happy. But maze of low, bubble-like structures, aspect. Loy Chuk's people had built their homes mostly underground, since the beginning of their foggy evolution. Besides, of subterranean passages and rooms was welcome. The mummy was taken to Loy Chuk's laboratory, a short distance below the surface. Here at once, the scientist began his work. The body of the ancient of clothing. Loy Chuk put an odd, Loy Chuk pushed another switch. animal chucklings around blazed around that moveless form. For Ned Vince, timeless eternity ended like a gradual fading mist. When he could see clearly All this weirdness had a violent effect on Ned Vince—a sudden, nostalgic panic. Something was fearfully wrong! him, as of some vast, un-Earthly metropolis. "Take it easy, Ned Vince...." The words themselves, and the tone was wrong. It was high, shrill, parrot-like, and mechanical. Ned's gaze searched for the source of the voice—located the black box just outside of his To Ned Vince, it was all utterly insane and incomprehensible. A rodent, looking like a prairie dog, with a vast and unlooked-for a little but plainly possessing success. somehow, simply because they could never belong in a place as eerie as this. Ned Vince did not know how Loy Chuk had probed his brain, with the aid of a pair of helmets, He crouched there on his and that Loy Chuk had haunches, at the dry bottom of great difficulty speaking English words, anyway. Ned's dark hair was wildly awry. His gaunt, young face held befuddled terror. He gasped Loy's box, with its recorded Loy read the illuminated symbols in his own language, flashed on a frosted crystal plate before him. Thus he knew what Ned Vince was saying. Loy Chuk pressed more keys, home-town of Harwich again. Chuk...." bold, friendly terms. Thus Loy sought, with calm, human logic, to make his charge feel at home.

<question>:
Why does Loy Chuk build an artificial environment for Ned?

<options>:
A He needs to keep Ned calm. If Ned believes himself to back in his own time, he will remain calm.
B He realizes Ned is mentally unstable from the trauma of being brought back to life. He doesn't want Ned to commit suicide.
C He needs a habitat for Ned until they can figure out time travel.
D He needs a habitat for Ned, so he can study Ned in a natural setting.

<answer>:

D