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

<passage>:
started toward the little stretch of trees and brush, walking carefully because of the lesser gravitation. Thig was shorter than the average Earthman—although on Ortha he was well above the average in height—but his body was thick and The Earthman was opposite now and he must waste no more precious time. The mighty muscles of the Orthan sent him hurtling across the intervening space in two prodigious bounds, and his hands clamped across the mouth and neck of the stranger.... going stale. He had sat every day for eight hours in front of that shiny-buttoned bane of the typist, but there were no results. Feebly he had punched a key two days ago and a $ sign had appeared. He hadn't could not write a word. Visions of whooping red-skinned Apaches and be-chapped outlaws raiding his little trailer home kept rolling up out of his subconscious. Yet he "Hey!" he shouted as a naked man sprang out of the bushes beside the road. "What's the trouble?" stranger had wound around him and two hamlike hands shut off his speech and his wind. He fought futilely against trained muscles. The hand clamping his throat relaxed for a moment and hacked along the side of wears he might be Thig." "Thig will be this creature!" announced Torp. "With a psychic relay we will transfer the Earthman's memories and meager store of knowledge to the brain of Thig! He can then go out and scout this world without these clumsy sheathing upon his body. On Ortha we do not hamper the use of our limbs so." "Do not question the word of your commander," growled Torp, swelling knew neither father nor mother. Affection and love were entirely lacking in their early training and later life. They were trained antlike from childhood that only the growth and power of the Horde were of any moment. Men and women alike toiled and died like unfeeling For ten hours or more the droning hum of the relay sucked Terry's brain dry of knowledge. The shock upon the nervous system of the Earthman proved too violent and his heart faltered after a time and stopped completely. Twice, with subtle drugs they restored pseudo-life to his body and kept the electrical impulses throbbing from his tortured brain, but after the third suspension of life Thig removed his helmet. "There is nothing more to learn," he informed his impassive comrades. primitive impulses of barbarism so he was incapable of understanding the emotions that swept through his acquired memory. trembling, against his own. That same hot wave of pulsing blood choked achingly up into his throat. to wipe the grotesque civilizations of Earth out of existence would, for reasons that he had never known existed. He had learned the heady glory of thinking for himself and making his own decisions. He had experienced the primitive joy of matching his wits and tongue against the wits of other unpredictable human beings. There was no abrupt red the peaks above the harsh black-and-whites of the sagebrush and cactus slopes. There was the little boy, his body burning with fever, who nestled trustingly against his tense man's body and slept—the son of Ellen and the man he had destroyed. Thig groaned. He was a weakling to let sentimentality so get the better "Hurry home, dear," she said. "I'll have a bite ready in about an hour." He dared not say anything, for his voice would have broken and she would have known something was wrong. She was a very wise sort of person when something was troubling him. He waved his stubby paw of a hand to show that he had heard, and blindly hurried toward the Sound. Oddly enough, as he hurried away along the narrow path through the lived no longer. He mentally titled it: "Rustlers' Riot" and blocked in the outlines of his plot. One section of his brain was that of the sapping the life from his own brain. He knew that the story would never "You have done well," announced Torp when Thig had completed his report "I will recommend the conquest of this planet, 72-P-3 at once and the complete destruction of all biped life upon it. The mental aberrations exile them on one of the less desirable continents, Antarctica for "Only the good of the Horde matters!" shouted Torp angrily. "Shall a forgotten." "Check the blood of Thig for disease, Kam," ordered Torp shortly. "His words are highly irrational. Some form of fever perhaps native to this the invisible radiations from that weapon's hot throat and flesh or vegetable fiber rotted into flaky ashes. it tore free from the feeble must eliminate for the good of the Horde." Then it was that Thig went berserk. His fists slashed into the thick weapon tilted upward until it reached the level of Thig's waist. Thig suddenly released his grip and dragged his enemy toward him. A sudden Before Thig's eyes half of his comrade's body sloughed away into foul corruption that swiftly gave way to hardened blobs of dessicated matter. Horror for what he had done—that he had slain one of his own He saw the heavy barrel of the blaster slashing down against his skull but he could not swing a fraction of an inch out of the way. His body seemed paralyzed. This was the end, he thought as he waited stupidly for the blow to fall, the end for Ellen and the kids and all Then a thunderclap exploded against his head and he dropped endlessly toward the deck. Blows rained against his skull. He wondered if Torp would ever cease to hammer at him and turn the deadly ray of the weapon hammer they shook his booming head. No longer was Torp above him. He his skull and in his matted hair. Torp must have thought he had killed him with those savage blows upon the head. Even Torp, thought Thig ruefully, gave way to the primitive rage of his ancestors at times but to that very bit of unconscious atavism he now used the blaster to destroy any possibility of remaining life in his unconscious body. Thig rolled slowly over so that his eye found the door into the control room. Torp would be coming back again to dispose of their bodies why he had been left until last. Perhaps Torp wished to take cultures the metal of the gun making a harsh clang. He heard the feet of Torp full into the glaring vacant orbs of his commander. Torp leaned there his own violent avenging of Kam's death, and now the apparent return of the man he had killed come to life had all served to jolt his rigidly trained brain from its accustomed groove. The shock had been too much for the established thought-processes of the Orthan. the skeleton-thing that had been Torp, using the new strength that victory had given him to drive him along. He went to the desk where Torp had been writing in the ship's log and strikes at the brain centers and causes violent insanity is existent Already I feel the insidious virus of.... And there his writing ended abruptly. Thig nodded. That would do it. He set the automatic pilot for the planet Ortha. Unless a rogue asteroid or a comet crossed the ship's on 72-P-3. The body of Torp would help to confirm his final message. hull, and cut free from the mother vessel. that all planets had for an incoming ship. He reduced the drive of his rockets to a mere whisper, striving to control the impatience that crowded his mind. He shivered suddenly, remembering his utter callousness the first time Earth was not far below him. As he let gravity suck him earthward, he heaved a gasp of relief. He was no longer Thig, a creature of a Horde's The knowledge that Ellen's love was not really meant for him would be

<question>:
What ultimately brings Torp down?

<options>:
A He went mad from the same disease that's afflicting Thip.
B Thip shoots him with a blaster before he can comprehend what happened.
C His own madness. His overly trained mind can't handle the new circumstances.
D He was never trained for a situation like this. He's not able to keep up with Thip.

<answer>:

B