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

<passage>:
them, how could he give Corisande up to them? True, it was the right thing to do—but, for the first time in his life, he could not bring himself to do what he knew to be right. He was weak, weak—and weakness was sinful. His old Belphin teacher had taught him that, too. "Corisande...." he breathed. As the vastly advanced guardians of mankind, the Belphins knew how to make a lesson stick—but whom? "But I thought you devised it!" "So it was "Corisande," he murmured, "you are as noble and clever as you are beautiful." Then he caught the full import of her remarks. " Me! But they won't pay any attention to me!" "How do you know?" When he remained silent, she said, "I suppose you've already tried to warn them about us." had nothing to do with the plot." "That was good of you." She continued in a warmer tone: "How many Belphins did you warn, then?" "Just one. When you tell one something, you tell them all. You know that. Everyone knows that." "That's just theory," she said. "It's never been proven. All we do know is that they have some sort of central clearing house of information, presumably The Belphin of Belphins. But we don't know that they are incapable of thinking or acting individually. We don't really know much about them at all they're very secretive." "And if none listens to me?" in the darkness, the jewel swung madly on her presumably heaving bosom. "This is bigger than both of us. It's for Earth." He knew it was his patriotic duty to do as she said still, he had enjoyed life so much. "Corisande, wouldn't it be much simpler if we just destroyed your uncle's secret weapon?" As he passed between the tall columns leading into the Flockhart courtyard, he noted with regret that there were quite a number of Corisande's relatives present, lying about sunning themselves and sipping beverages which probably touched the legal limit of intoxicatability. Much as he hated to think harshly of anyone, he did not like Corisande Flockhart's relatives. He had never known anybody who had as many relatives as she did, and sometimes he suspected they were not all related to her. Then he would dismiss the thought as unworthy of him or any right-thinking human being. He loved Corisande for herself alone and not for her family. Whether they were actually her family or not was none of his business. they knew all about the Flockharts and everything would be all right. Next morning, he set out to warn Belphins. He knew it wasn't much use, but it was all he could do. The first half dozen responded in much the same way the Belphin he had warned the previous day had done, by courteously acknowledging his solicitude and assuring him there was no need for alarm After that, they started to get increasingly huffy—which would, he thought, substantiate the theory that they were all part of one vast coordinate network of identity. Especially since each Belphin behaved as if Ludovick had been repeatedly annoying "Now, Grandfather," Corisande said, "no matter what your politics, that does not excuse impoliteness." Ludovick wished she would not allude so blatantly to politics, because he had a lurking notion that Corisande's "family" was, in fact, a band of conspirators ... such as still dotted the green and pleasant planet and proved by their existence that Man was not advancing anywhere within measurable distance of that totality of knowledge implied by the Belphin. "Bah!" said old Osmond Flockhart, Corisande's grandfather. Ludovick was sure that, underneath his crustiness, the gnarled patriarch hid a heart of gold. Although he had been mining assiduously, the young man had not yet been able to strike that vein him it was that such behavior was considered ungenteel. Ludovick would never have dreamed of associating with this set of neighbors, once he had discovered their tendencies, had he not lost his heart to the purple-eyed Corisande at their first meeting. "Politeness, bah!" old Osmond said. "To see a healthy young man simply—simply accepting the status quo!" "Go back, young man," he said. "You're not wanted here." Suddenly this particular Belphin lost his commanding manners. He began to wilt, insofar as so rigidly constructed a creature could go limp. "Please, we've done so much for you. Do this for us." "The Belphin of Belphins did things for us," Ludovick countered. "You are all only his followers. How do I know you are really Behind his back, Corisande made a little filial face at Ludovick. "They certainly did a good job of brainwashing you, boy," Osmond sighed. "And of most of the young ones," he added mournfully. "With each succeeding generation, more of our heritage is lost." He patted the girl's hand. "You're a good girl, Corrie. You don't hold with this being cared for like some damn pet poodle." the barriers were not lethal—or perhaps even actual. But what of Mieczyslaw? And George? And countless rumored others? He would not let himself even try to think of them. He would not let himself even try to think of anything save his duty. "You fool...." it gasped. "Through your muddle-headed integrity ... you have destroyed not only me ... but Earth's future. I tried to make ... this planet a better place for humanity ... and this is my reward...." Corisande gave one of the rippling laughs he was to grow to hate so much. "Darling, "Nonsense, my boy they'll adore you. You'll be a hero!" Shortly after he was universally acclaimed President, he married Corisande. He couldn't escape. He never drew another happy breath. In the first place, now that The Belphin was dead, all the machinery that had been operated by him stopped and no one knew how to fix it. The sidewalks stopped moving, the air conditioners stopped conditioning, the food synthesizers stopped synthesizing, and so on. And, of course, everybody blamed it all on Ludovick—even that year's run of bad weather. There were famines, riots, plagues, and, after the waves of mob hostility had coalesced into national groupings, wars. It was like the old days again, precisely as described in the textbooks. He turned to the girl, who was looking thoughtful as she stroked the glittering jewel that always hung at her neck. "Corisande, how can you stay with these—" he found another word—"these it makes him feel she doesn't really love him. So, in thirtieth year of his reign as Dictator of Earth, Ludovick poisoned Corisande—that is, had her poisoned, for by now he had a Minister of Assassination to handle such little matters—and married a very pretty, very young, very affectionate blonde. He wasn't particularly happy with her, either, but at least it was a change. Outside the Flockhart villa, he paused, struggling with his inner self. It was an unworthy thing to inform upon one's neighbors force !" Corisande gave a rippling laugh as she twirled her glittering pendant. "In a manner of speaking," she said. "I have an idea for a secret weapon which might do the trick——" "Nonsense!" Corisande said, putting her hand on his shoulder. "I didn't hear anything." The uncle looked dubious, and Ludovick thought it prudent to withdraw at this point. Besides, he had heard enough. Corisande—his Corisande—was an integral part of the conspiracy. He lay down to sleep that night beset by doubts. If he told the Belphins about the conspiracy, he would be betraying Corisande. As a matter of fact, he now remembered, he

<question>:
What was a sign that Corisande's family was up to no good?

<options>:
A The wine they were drinking
B All of these are signs
C Having secret meetings
D Gathering in such large numbers

<answer>:

B