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

<passage>:
Thig of Ortha was the vanguard of the conquering Thig carefully smoothed the dark sand and seaweed of the lonely beach Thig was shorter than the average Earthman—although on Ortha he was well above the average in height—but his body was thick and were regular, perhaps a trifle oversize, and his hair and eyes were a curiously matching blend of reddish brown. Oddest of all, he wore no garments, other than the necessary belt and straps to support his The explorer from another world crouched into the concealment of a leafy shrub. A creature was approaching. Its squat body was covered Thig's cold eyes opened a trifle wider as he stared into the thing's metal at the reflection of himself! intervening space in two prodigious bounds, and his hands clamped across the mouth and neck of the stranger.... Lewis Terry was going fishing. For a week the typewriter mill that had ground out a thousand assorted yarns of the untamed West and the frigid be-chapped outlaws raiding his little trailer home kept rolling up out of his subconscious. Yet he had a fistful of short stories in the next two weeks to finance the great adventure—or the trip was off. So Lewis left the weathered old cottage in the early dawn and headed for his tubby old boat at the landing in an attempt to work out a salable yarn.... "Hey!" he shouted as a naked man sprang out of the bushes beside the 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 his head. Blackness flooded the brain of Lewis, and he knew no more. "He resembles Thig," announced Kam. "But for the strange covering he 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 "You are the commander," said Thig. "But I wish this beast did not wear "Do not question the word of your commander," growled Torp, swelling out his thick chest menacingly. "It is for the good of our people that you disguise yourself as an Earthman." "For the good of the Horde," Thig intoned almost piously as he lifted Terry's body and headed for the laboratory. cultured and brought to life in the laboratories of their Horde, they lacking in their early training and later life. They were trained one another by the intricacies of the psychic relay, put upon their heads. For ten hours or more the droning hum of the relay sucked Terry's brain completely. Twice, with subtle drugs they restored pseudo-life to his body and kept the electrical impulses throbbing from his tortured that episode gave Thig an idea about the little lump of jewels in his so he was incapable of understanding the emotions that swept through his acquired memory. and three other editors asked for shorts soon." "Shoulda got a hundred bucks for that yarn," grunted Thig, and gasped. For the moment he had been Lewis Terry and not Thig! So thoroughly had he acquired the knowledge of Terry that he found himself unconsciously adopting the thinking and mannerism of the other. All the better this way, he realized—more natural. "Sorry I was late," he said, digging into his pocket for the He flashed the jewels in front of Ellen's startled eyes and she clung, unbelieving, to his arm. "Why, Lew," she gasped, "they're worth a fortune! We can buy that new away.... Hollywood, the Grand Canyon, cowboys!" "Uh huh," agreed the pseudo Lewis, memories of the ferocious savages and gunmen of his stories rendering him acutely unhappy. Sincerely he hoped that the west had reformed. landed. And there Thig balked. Why must they destroy these people, Thig tried to tell himself that it was the transmitted thoughts of the 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 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 wanted to go along. He sent them away harshly He dared not say anything, for his voice would have broken and she 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 "You have done well," announced Torp when Thig had completed his report for the purposes of complete liquidation." "But why," asked Thig slowly, "could we not disarm all the natives and a race of primitives. It is not our duty to help to attain our own race of feeble-witted beasts, such as these Earthmen, stand in the way "Check the blood of Thig for disease, Kam," ordered Torp shortly. "His case. He approached Thig warily, aware that disease often made a maniac Then it was that Thig went berserk. His fists slashed into the thick fought against that lone arm of Thig. weapon tilted upward until it reached the level of Thig's waist. Thig about full upon its owner's thick torso. Thig's fingers pressed down Before Thig's eyes half of his comrade's body sloughed away into foul Horde—made his limbs move woodenly. All of his thoughts were dulled narrowed icy eyes of his commander. his skull and in his matted hair. Torp must have thought he had killed Even Torp, thought Thig ruefully, gave way to the primitive rage of his but to that very bit of unconscious atavism he now Thig rolled slowly over so that his eye found the door into the control why he had been left until last. Perhaps Torp wished to take cultures of his blood and tissues to determine whether a disease was responsible for his sudden madness. Thig raised himself up on a quivering elbow and slid the black length watching him, his breath gurgling brokenly through his deep-bitten lips. The clawing marks of nails, fingernails, furrowed his face and chest. He was a madman! The deadly attack of Thig 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. So Thig shot him where he stood, mercifully, before that vacant mad victory had given him to drive him along. He had saved a world's civilization from extinction! The thought sobered him yet, somehow, he was pleased that he had done so. After all, it had been the Earthwoman and the children he had been thinking Thig nodded. That would do it. He set the automatic pilot for the He shivered suddenly, remembering his utter callousness the first time despite his acquired memory and traits, he was an alien from outer He fingered the tiny scars that had completely obliterated the slight differences in his appearance from an Earthman's, and his fingers heaved a gasp of relief. He was no longer Thig, a creature of a Horde's creation, but Lewis Terry, writer of lurid gun-smoking tales of the West. He must remember that always. He had destroyed the real Terry and now, for the rest of his life, he must make up to the dead man's family. The knowledge that Ellen's love was not really meant for him would be The bulge of Earth was flattening out now and he could see the outlines He had seen those other worlds. Perhaps some day he would write about them.... He was Lewis Terry! He must remember that!

<question>:
Why was Thig informed that he should be camouflaged as a human?

<options>:
A So that he could scout out the surroundings without suspicions
B So that he could learn the inner thoughts of humans.
C So that no one would know that Lewis was taken.
D So that he could impersonate Lewis and fool his family.

<answer>:

A