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

<passage>:
arrangement: I did what Peter wished, so long as I did not actively want to do otherwise, because he had done things for me. Very well, then we must not go back. It was very simple, but I knew that he could not comprehend it. I tried to explain it to him, however. But he only stared at me, with than they were. I did not even wish that Peter were not dead, for stern—all the children of his brain. Out there, away from the muffling, distorting, damnable blanket of atmosphere, away from Earth's inexorable gravitational pull, would be a laboratory such as man had never seen. The ship would be filled with the sounds of busy men and women, wresting secrets from the reluctant Will we?" he asked himself softly. It was only two stories down the moving ramp to Lorelei Cooper's laboratory. Peter took it in fifteen seconds, running, and stumbled to a halt in front of the door marked "Radiation." She had set her door in the wrong place, and squeezed through the door as soon as it opened far enough to admit him. Lorelei, beautiful in spite of dark-circled eyes and a smear of grease on her chin, looked up from a huge ledger at the end of the room. One blonde eyebrow arched in the quizzical expression he knew so well. "Yes, of course. But really, Pete—" "You'll understand in a minute. Turn it on, Lorelei." She gazed at him levelly for a moment, kissed him impulsively, and then walked over to the video panel on the wall and swept a mountain of suddenly leapt into full brilliance. Lorelei caught her breath. strangled voice. "Stay off the streets. Hide yourselves. Stay off the streets...." His voice droned on, but neither of them heard it. Lorelei buried her head on his chest, clutching at him desperately. "Peter!" she said faintly. "Why do they broadcast such things?" "They have to," he told her grimly. "There will be panics and suicides, and they know it but they have to do it. This isn't like a war, where Then they faded slowly. It was impossible to say whether they had gone through the solid wall, or simply melted away. The man and woman clung together, waiting. There was a thick, oppressive silence, full of small rustlings and gurgle and died, leaving silence again. Peter's lips were cold with sweat. Tiny nerves in his face and arms were jumping convulsively. His stomach crawled. He thrust the girl away from him and started toward the inner room. "Wait here," he mouthed. She was after him, clinging to his arms. "No, Peter! Don't go in there! Peter! " But he pushed her away again, woodenly, and stalked forward. cleared away to make room for an incompleted setup. Peter walked down range of vision. Peter forced himself forward another step. Little Harry Kanin, Lorelei's assistant, was crumpled in a corner, half supported by the broad base of an X-ray chamber. His face was flaccid and bloated. His glazed eyes, impassive yet somehow pleading, stared at nothingness There was a scream in his throat that would not come out. He was beyond fear, beyond agony. He turned to the still-hovering monsters and said in a terrible voice, "Why? Why?" " He heard a faint sound behind him, and whirled. It was the first time he had realized that Lorelei had followed him. She stood there, swaying, very pale, looking at the red Invaders. Her eyes swiveled slowly.... Opreniktoulestritifenrelngetnaktwiltoctpre. " His voice was hoarse. "Don't look! Don't—Go back!" The horrible, mindless noise in his throat was almost beyond his power to repress. His insides writhed to thrust it out. She didn't see him. Her eyes glazed, and she dropped limply to the floor. The scream came out then. Before he knew, even, that he could hold a scream to wake the dead. Somebody said, "Doctor!" He wanted to say, "Yes, get a doctor. Lorelei—" but his mouth only twitched feebly. He couldn't seem to get it to work properly. He tried again. "Doctor." pressed him back into the sheets. "You're in a hospital. Just lie quietly, please." He tried to get up again. "Where's Lorelei?" "She's well, and you'll see her soon. Now lie quietly. You've been a very sick man." —than three—months." He was right. All the nurses, and even Dr. Arnold, were evasive, but he kept asking them why he couldn't see Lorelei, and finally he wormed it out of them. It had been nine and a half months, not three, and he'd been in a coma all that time. Lorelei, it seemed, had recovered much sooner. "She was only suffering from ordinary shock," Arnold explained. "But where is she?" Peter complained. "You still haven't explained why I haven't been able to see her." months ago." "But why?" Peter whispered. enough to take care of a quarter of the earth's population, the other three-quarters will be dead, or worse." "I wonder," Peter said shakily, "if I am strong enough to take it." "I see," said Peter. And for the first time, he thought of the . He stepped away now, and joined the group a little distance away, silently waiting. Lorelei said, "You can't do it. I won't let you! Peter—" "Darling," he began wearily. "Don't throw your life away! Give us time—there must be another way." "There's no other way," Peter said. He gripped her arms tightly, as if he could compel her to understand by the sheer pressure of his fingers. "Darling, listen to me. We've tried everything. We've gone underground, but that's only delaying the end. They them , but a superman could. That's our only chance. Lorelei—darling—don't you see that?" She choked, "But why can't you take me along?" He stared unseeingly past her wet, upturned face. "You know why," he said bitterly. "Those rays are strong. They don't only work on embryos Her sobs gradually died away. She straightened slowly until he no longer had to support her, but all the vitality and resilience was gone out of her body. "All right," she said in a lifeless voice. "You'll come back, Peter." He turned away suddenly, not trusting himself to kiss her goodbye. A line from an old film kept echoing through his head. " They'll he slumped down before them and listlessly closed the contact of the visiplate. its slow, monstrous alchemy upon him. Peter waited until the changes hungry, slept when his driving purpose let him, and worked unceasingly, searching for the million-to-one chance. Earth, wondering if the race he had left behind still burrowed in its worm-tunnels, digging deeper and deeper away from the sunlight. But after a time he ceased even to wonder. Peter closed the diary. "The rest you know, Robert," he said. He turned again, and I saw the old scar on his cheek where I had once accidentally drawn one of my talons across his face. "And now," he said softly, "we will go home. I've waited so long—keeping the control chamber and the engine room locked away from you, not telling you, even, about Earth until now—because I had to be understand them, and so you can conquer them." I said, "That is the reason why we will not go back to Earth." He stared at me, his jaw slack, his hands trembling. "What—what did

<question>:
Why did Peter choose to go on the mission by himself rather than taking Lorelei with him?

<options>:
A Women needed to stay underground for reproduction purposes
B There was only room for one passenger in the ship.
C There was a slim chance of survial
D Lorelei was too afraid to make the journey with him.

<answer>:

C