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

<passage>:
super-monsters who had invaded Earth. But he was forgetting one tiny thing—like calls to like. 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 went to Earth, I would use your people to further my knowledge, just as 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 Peter Karson was dead. He had been dead for some time now, but the dark blood was still oozing from the crushed ruin of his face, the shock had deranged his mind. His voice trembled when he said, "But if I ask you to kill them, and not my people?" arrangement: I did what Peter wished, so long as I did not actively than they were. I did not even wish that Peter were not dead, for me, nagging, gnawing. And suddenly—something moved on the skin of my cheek. I raised a hand to it, slowly. Young Peter Karson put the last black-print down and sighed with One part of his brain had been shocked into its shell. It was hiding glad that what he had seen was terrible reality rather than even more terrible illusion. INVADERS APPEAR IN BOSTON. 200 DEAD Then lines of type, and farther down: NO COMMUNICATION FROM ANTARCTICA IN 6 HOURS STRANGE FORCE DEFLECTS PLANES FROM SAHARA AREA WORLD POLICE MOBILIZING "The reason for this ... order must be apparent to all civilized peoples. For the Invaders have spared no part of this planet in their depredations: they have laid Hong Kong waste they have terrorized London they have destroyed the lives of citizens in every member state and in every inhabited area. There can be few within reach of printed reports or my words who have not seen the Invaders, or whose friends have not seen them. "The peoples of the world, then, know what they are, and know that we face the most momentous struggle in our history. We face an enemy superior to ourselves in every way . "Since the Invaders first appeared in Wood River, Oregon, 24 hours ago, they have not once acknowledged our attempts to communicate, or in any way taken notice of our existence as reasoning beings. They have treated a newly-discovered race of lower animals. They have not attacked our centers of government, nor immobilized our communications, nor laid siege to our defenses. But in instance after instance, they have done as they would with us. They have examined us, dissected us, driven us mad, killed us with no discernable provocation and this is more intolerable than any normal invasion. "I have no fear that the people of Earth will fail to meet this challenge, for there is no alternative. Not only our individual lives 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. helpless protoplasm. The thin moaning that went up from them was more horrible than any cry of agony. "The Invaders are here, citizens," the commentator was saying in a strangled voice. "Stay off the streets. Hide yourselves. Stay off the streets...." His voice droned on, but neither of them heard it. "Peter!" she said faintly. "Why do they broadcast such things?" and they know it but they have to do it. This isn't like a war, where the noncombatants' morale has to be kept up. There aren't going to be any noncombatants, this time. Everybody in the world has to know about them, so that he can fight them—and then it may not be enough." away from their victims and angled slowly up the street. Peter reached out to switch off the scanner, and froze. The girl felt his muscles tense abruptly, looked back at the scene. The Invaders were floating up the sloping side of a tall, pure white structure that dominated the rest. Peter's lips were cold with sweat. Tiny nerves in his face and arms Peter! cleared away to make room for an incompleted setup. Peter walked down Peter forced himself forward another step. Little Harry Kanin, In a moment Peter realized what they were doing to him. He stood, legs grew wider and more shapeless, his cheeks caved in and his skull puddle of flesh. Peter could not look at it. but there was a tiny sound in Peter's brain, a thin, dry whispering. were lines in the face, but they were lines of age, not emotion. Only " He heard a faint sound behind him, and whirled. It was the first " His voice was hoarse. "Don't look! Don't—Go back!" The horrible, He wanted to say, "Yes, get a doctor. Lorelei—" but his mouth only Peter's head began spinning just a little. Glass clinked from a metal "But where is she?" Peter complained. "You still haven't explained why "But why?" Peter whispered. has failed." Peter couldn't think of anything to say. Dr. Arnold's voice went on after a moment, musingly. "We're burrowing into the earth, like worms. It didn't take us long to find out we couldn't kill them. They didn't when a squadron of the Police caught about fifty of them together at one time, and attacked with flame guns and a new secret weapon. It didn't hurt them, but it annoyed them. It was the first time they'd "And since then?" Peter asked huskily. an impossible task if we tried to include all the thinly-populated areas, of course, but it doesn't matter. By the time we excavate "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 The Avenger . He stepped away now, and joined Lorelei said, "You can't do it. I won't let you! Peter—" but that's only delaying the end. They still come down here, only not as many. The mortality rate is up, the suicide rate is up, the birth "They'll live, and we'll die, because they're a superior race. We're a million years too far back even to understand what they are or where they came from. Besides them, we're apes. There's only one answer." possible mutations, there's one that will save the human race. We can't fight them come back, Peter." back—but not as boys !" We'll come back, but not as men. We'll come back, but not as elephants. The Avenger its slow, monstrous alchemy upon him. Peter waited until the changes his cheeks were blobbed with excresences of one corner of his mouth was drawn up in a perpetual grin. He had a tiny sixth finger on his left hand. 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 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." I said, "That is the reason why we will not go back to Earth."

<question>:
How did Peter get the scar on his cheek?

<options>:
A From an accidental talon scratch
B From traveling through the dangerous rays.
C From the construction of his ship
D From the Invaders attack.

<answer>:

A