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

<passage>:
I repeated it patiently. "But why?" he cried, sinking down into the chair before me. In an instant all the joy had gone out of him. I could not understand his suffering, but I could recognize it. "You yourself have said it," I told him. "I am a being of logic, just as the beings who have invaded your planet are. I do not comprehend the things which you call hate, fear, joy and love, as they do not. If I the invaders do. I would have no reason to kill the invaders. They are more nearly kin to me than your people." Peter's eyes were dull, his limbs slumped. For a moment I thought that the shock had deranged his mind. trickling down into his sodden sleeve, and falling, drop by slow drop, "To do so would be illogical." He waved his hands helplessly. "Gratitude?" he muttered. "No, you don't understand that, either." Then he cried suddenly, "But I am your friend, Robert!" "I do not understand 'friend,'" I said. I did understand "gratitude," a little. It was a reciprocal 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 Peter called an emotion and yet it had nothing to do with logic, to the end that I knew was inevitable. either. It was just an emptiness—a void that could not be filled by not solve. Strange, disturbing sensations stirred and whispered within A tear was trickling down my cheek. Young Peter Karson put the last black-print down and sighed with satisfaction. His dream was perfect the was complete, every minutest detail provided for—on paper. In two weeks they would be laying the core, and then the metal giant itself would begin to grow, glittering, pulsing with each increment of power, until at last it lay the that thin, dark whisper of dread was at the back of his mind. Slowly, impassively in at him. That was the first impression he got For a moment or an eternity it hung there, unsupported, the bulging slowly away and was gone. He stared after it, stunned into immobility. Down in the street after a moment he heard the faint swish of a tube car going past. Everything One part of his brain had been shocked into its shell. It was hiding from the thing that had hurt it, and it refused to respond. But the Relief washed over him, leaving him breathless. He was horrified, of course, but only abstractedly. For the moment he could only be glad that what he had seen was terrible reality rather than even more Then lines of type, and farther down: The item below the last one said: we face the most momentous struggle in our history. We face an enemy driven us mad, killed us with no discernable provocation and this is are threatened, but our existence as a race. We must, and will, destroy the Invaders!" Peter sank back in his chair, the full shock of it striking him for the first time. " laboratory. Peter took it in fifteen seconds, running, and stumbled to "What makes, Peter my love?" she asked, and bent back to the ledger. them, so that he can fight them—and then it may not be enough." Then they faded slowly. It was impossible to say whether they had gone The man and woman clung together, waiting. There was a thick, oppressive silence, full of small rustlings and screamed in a high, inhuman voice. The screamed dwindled into a throaty gurgle and died, leaving silence again. from him and started toward the inner room. "Wait here," he mouthed. cages, and paused just short of it. straight ahead of him. 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?" were lines in the face, but they were lines of age, not emotion. Only "I can't understand," he cried wildly. "What do you want?" He heard a faint sound behind him, and whirled. It was the first slowly.... His voice was hoarse. "Don't look! Don't—Go back!" The horrible, The scream came out then. Before he knew, even, that he could hold the room. It was a scream to split eardrums "Where am I?" he said. He tried to turn his head, but a firm hand "She's well, and you'll see her soon. Now lie quietly. You've been a before he drifted off, he said sleepily, "You can't—fool me. It's been —than three—months." for approximately five minutes. Yes, we know—you talked a lot. It's a miracle you're alive, and rational." "But where is she?" Peter complained. "You still haven't explained why I haven't been able to see her." Arnold frowned. "All right," he said. "I guess you're strong enough to "But why?" Peter whispered. Arnold's strong jaw knotted. "We're hiding," he said. "Everything else has failed." Peter couldn't think of anything to say. Dr. Arnold's voice went on areas, of course, but it doesn't matter. By the time we excavate 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." Arnold laughed harshly. "You are. You've got to be. You're part of our last hope, you see." "Our last hope?" "I see," said Peter. And for the first time, he thought of the A man had just finished engraving the final stroke on its nameplate, to the left of the airlock— the group a little distance away, silently waiting. "Don't throw your life away! Give us time—there must be another way." but that's only delaying the end. we're riding a curve that ends in extinction fifty years from now. out of her body. "All right," she said in a lifeless voice. "You'll line from an old film kept echoing through his head. " He was trembling violently. He ran the last few steps, stumbled into He heard the massive disk sink home, closing him shaking hands. After a while he roused himself, closed the inner door of the lock behind him, and walked down the long corridor into the control chamber. heavy doors that closed the tunnel above him flashed back, one by one. The energy-charged screen flickered off to let him pass, and closed smoothly behind him. The last doors, cleverly camouflaged, slipped back into place and then dwindled in the distance. It was done. The the silence pressed in about him. its slow, monstrous alchemy upon him. Peter waited until the changes were unmistakably evident in his skin and hair, and then he smashed all after a time he ceased even to wonder. eager brain, and watched it through the swift years, with a dawning hope.... Peter closed the diary. "The rest you know, Robert," he said. "Yes," I told him. "I was that child. I am the millionth mutation you were searching for." He rose and strode nervously over to the window. I watched him as he "And now," he said softly, "we will go home. I've waited so sure. But now, the waiting is over. "They're still there, I'm sure of it—the people, and the Invaders. You can kill the Invaders, Robert." He looked at me, a little oddly, almost as if he had some instinctive knowledge of what was to come. But he went on swiftly, "On Earth we had a saying: 'Fight fire with fire.' That is the way it will be with you. You are completely, coldly logical, just as they are. You can understand them, and so you can conquer them." you say?"

<question>:
By the end of the passage. what can we understand about the opening scene?

<options>:
A Without Peter, the ship won't be functional anymore.
B Despite being logical, Robert feels emotional about killing Peter.  He is at odds with himself.
C Robert kills Peter without any thought behind it.
D Robert's cold logic has won him over completely.

<answer>:

B