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

<passage>:
valor for them to hunt men in the world of men. In that fact lay a key to their character—if such utterly alien creatures could be said to have character. luxuries, including women. If it only had a lease that could be broken— only garment to make sure that they were on properly. They were. He had thought them up in a moment of utter boredom and they were extremely tight-fitting tubular gown. "If I could do anything about it...." "But you can't," he told her. "They're too clever." "Is this crop rotation or did you send for me?" she asked cynically. "If you did, I wish you hadn't. You haven't asked about your son." himself—desire that both of them loathed because it was implanted within them by their captors. a female foreman in a garment-cutting shop before being captured and brought through. "Good," he said. "Glad to hear it." He felt oddly embarrassed. He Rog! expression—approval that faded quickly as soon as she caught his gaze upon her. The food arrived then and they sat down at the round table to Eudalia laid down her fork with a clatter and regarded Dana disapprovingly. "Why take it out on Rog?" she asked bluntly. "He didn't ask to come here any more than we did. He's got a wife back home. Maybe you want him to fall in love with you? Maybe you're jealous because "Rog," said Dana, looking suddenly scared, "I'm sorry I snapped at you. "Why do they do it—the other way, I mean?" asked Dana. it's because they're pretty human." " Human! "Hold on," he said. "They pass through their gateway to Earth at considerable danger and, probably, expense of some kind. Some of them don't come back. They kill those of us who put up a fight. Those who don't—or can't—they bring back with them. Live or dead, we're just laboratory specimens." Rog?" "Of course not," he agreed. "In the one instance, we're the hunters, the breeders, the trophy collectors. In the other"—he shrugged—"we're the trophies." There was a long silence. They finished eating and then Dana stood up over. He had felt the inner tug of command, said good-by to the women and returned to his smaller compound within its own barrier dome. it was , that was all. Opal Opal. and Opal would have shown no reaction. Yet deep breath. He thought of the space beside Opal. It took about three feet. He was getting good at it. Dog does trick, he thought. He went through the entire routine at Opal's bidding. When at last he was allowed to relax, he wondered, not for the first time, if he weren't mastering some of the alleged Guru arts. At once he felt probing investigation. Opal, like the rest of the captors, was as curious as a cat—or a human being. Tennant sat against a wall, drenched with sweat. There would be endless repetition before his workout was done. On Earth, dogs were said to be retrieve. Some days later, the training routine was broken. He felt a sudden stir of near-sick excitement as he received the thought: Now you are ready. We are going through at last. Opal was nervous, so much so that he revealed more than he intended. his role was to be. He had little time to speculate before Opal seemed to envelop him. There was the blurring wrench of forced teleportation and they were in Opal was annoyed that Tennant could make nothing of it. Then came the thought: a costume of mediaeval motley, complete with Pied Piper's flute. He received quick reproof that made his head ring as from a blow. He asked Opal where and when they were going, was informed that he would soon emerge on Earth where he had left it. That told him everything but the date and season. Opal, like the rest of the captors, that might have made Opal suspicious. He should be somewhat excited. to see his wife again ... and maybe he could trick his way into not thought down where Opal could not detect it. leave them there, then knew that he would try somehow to get them out. Not, of course, anything that would endanger his remaining with Agatha the only way his captors would get him back would be as a taxidermist's specimen. He realized, shocked and scared, that his thoughts of escape had slipped past his mental censor, and he waited apprehensively for Opal to strike. Nothing happened and he warily relaxed. Opal wasn't tapping couldn't on Earth? but he'd get them back or another pair. The credenza had been replaced by a huge and ugly television console. That, he resolved, would go down in the cellar rumpus room, where its bleached modernity wouldn't clash with the casual antiquity of the living room. Agatha would complain, naturally, but his being back would make up for him, her lovely face lifted to be kissed, and his heart lurched like an adolescent's. This hunger was real, not implanted. Everything would be real ... his love for her, the food he ate, the things he touched, his house, his life.... The thought message from Opal crumbled his illusion of freedom. He sank down in a chair, trying to refuse to listen to the rest of the command: Tennant shook his head, stiff and defiant in his chair. The punishment, when it came, was more humiliating than a slap across a dog's snout. Opal had been too interested in the next lab specimen to bother about his thoughts—that was why he had been free to think of escape. But there was no pleasure in it, only a confirmation of his captor's power over him. He was not free of them. He understood all too well what they wanted him to do he was to play the Judas goat ... or rather the Judas ram, leading another victim to the fourth-dimensional pen. a grab for me . He'd had one too many and only wanted a little fun. captors had let him. served as a bar. It was fully equipped—with more expensive liquor, he noticed, than he had ever been able to afford. He poured a drink of brandy, waited for the others to fill their glasses. Agatha looked at him over the rim of hers. "Tell us, Rog. We have a brought the four of them through, not since they had begun to train him for his Judas ram duties. desperately for six years, and he no longer wanted her. He was acutely "Rog," she said and her voice trembled, "what are we going to do? What want to do?" Take her back? He smiled ironically she wouldn't know what that meant. It would serve her right, but maybe there was another way. subsided in mumbles, he added, "Actually, I don't think I'm capable of making more than a fraction of the trouble for either of you that you both are qualified to make for yourselves." He lit a cigarette, inhaled. "Relax. I'm not planning revenge. After , as long as it was safe. Deliberately, Tennant poured himself a second drink. This might be easier and pleasanter than he had expected. They deserved some of the suffering he had had and there was a chance that they might get it. had been sitting there, unconscious, ripe fruit on their doorstep. They had simply picked him up. Otherwise, apparently, men were next to impossible for them to capture. All they could do was kill them and bring back their heads and hides as trophies. With women it was different—perhaps the captors' weapons, whatever they were, worked more efficiently on females. A difference in body chemistry or psychology, perhaps. More than once, during his long training with Opal, Tennant had sent questing thoughts toward his captor, asking why they didn't simply set up the gateway in some town or city and take as many humans as they

<question>:
Why did Opal let Rog go back to Earth?

<options>:
A so he would fall out of love with his wife
B so he could try to escape and fail
C because the aliens weren't good at capturing other men
D as a reward for his hard work

<answer>:

C