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

<passage>:
TOWER By EVELYN E. SMITH As the vastly advanced guardians of mankind, the Belphins knew how to make a lesson stick—but whom? others composing symphonies still others painting pictures. Those who were without creative talent or the inclination to indulge it would be relaxing their well-kept golden bodies in whatever surroundings they had chosen to spend this particular one of the perfect days that stretched in an unbroken line before every member of the human race from the cradle to the crematorium. Only the Belphins were much in evidence. Only the Belphins had duties to perform. Only the Belphins worked. you Courteous, like all members of his species, the creature leaped from the street and listened attentively to the young man's question. "We Belphins have but one like and one dislike," he replied. "We like what is right and we dislike what is wrong." had nothing to do with the plot." "We know they're very secretive." "Aloof," he corrected her, "as befits a ruling race. But always affable." "You must warn as many Belphins as you can." "And if none listens to me?" ," the Belphin said, gazing reverently across the city to the blue spire of the tower where The Belphin of Belphins dwelt, in constant communication with every member of his race at all times, or so they said. "That is why we were placed in charge of humanity. Someday you, too, may advance to the point where you know , and we shall return whence we came." "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 The Belphin. You're coming to warn attack "Then," she said dramatically, "you must approach The Belphin of Belphins himself." "But no human being has ever come near him!" he said plaintively. "You know that all those who have tried perished. And that can't be a rumor, because your grandfather said——" "But they came to "He'd only make another. Don't you see, Ludovick, this is our only chance to save the Belphins, to save humanity.... But, of course, I don't have the right to send you. I'll go myself." "No, Corisande," he sighed. "I can't let you go. I'll do it." 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 they knew all about the Flockharts and everything would be all right. 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 him . "I must see The Belphin of Belphins. I must warn him against the Flockharts." "All lies and exaggeration," old Osmond said. " My "The Belphin of Belphins did things for us," Ludovick countered. "You are all only his followers. How do I know you are really grandfather told me that, when the Belphins took over Earth, they rewrote all the textbooks to suit their own purposes. Now nothing but Belphin propaganda is taught in the schools." 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." following him? How do I know you haven't turned against him?" "I don't trust you or your brothers. I must see The Belphin himself." "It's only reasonable," the uncle went on, "that older people should have a—a thing about being governed by foreigners." Ludovick smiled and set his nearly full glass down on a plinth. "You could hardly call the Belphins foreigners they've been on Earth longer than even the oldest of us." "No coincidence at all," said Ludovick shortly, no longer able to pretend he didn't know what the other was getting at. He had heard the ugly rumor before. Of course sacrilege was not illegal, but it was in bad taste. "Only one combination of elements spawns intelligent life." "The barriers were triggered ... to respond to hostility.... You meant well ... so our defenses ... could not work." Ludovick had to bend low to hear the creature's last words: "There is ... Earth proverb ... should have warned me ... 'I can protect myself ... against my enemies ... but who will protect me ... from my friends'...?" The Belphin of Belphins died in Ludovick's arms. He was the last of his race, so far as Earth was concerned, for no more came. If, as they had said themselves, some outside power had sent them to take care of the human race, then that power had given up the race as a bad job. If they were merely exploiting Earth, as the malcontents had kept suggesting, apparently it had proven too dangerous or too costly a venture. Shortly after The Belphin's demise, the Flockharts arrived en masse. "We won't need your secret weapons now," Ludovick told them dully. "The Belphin of Belphins is dead." Corisande gave one of the rippling laughs he was to grow to hate so much. "Darling, "See?" old Osmond remarked with satisfaction. "The kid's brain-washed. I told you so." "Even if The Belphin is a single entity," Ludovick went on, "that doesn't necessarily make him less benevolent——" He was again interrupted by the grandfather. "I won't listen to any more of this twaddle. Benevolent, bah! He or she or it or them is or are just plain exploiting us! Taking our mineral resources away—I've seen 'em loading ore on the spaceships—and——" "They say," the uncle continued, impervious to Ludovick's unconcealed dislike for the subject, "that there's really only one Belphin, who lives in the Blue Tower—in a tank or something, because he can't breathe our atmosphere—and that the others are a sort of robot he sends out to do his work for him." "Nonsense!" Ludovick was goaded to irritation at last. "How could a robot have that delicate play of expression, that subtle economy of movement?" Corisande and the uncle exchanged glances. "But they are absolutely blank," the uncle began hesitantly. "Perhaps, with your rich poetic imagination...." "Tell us, dear boy," the uncle said, grabbing Ludovick's glass from the plinth and filling it, "what exactly did he say?" "He said the Belphins rule through the power of love." Twenty heads swiveled toward him. He felt uncomfortable, for he was a modest young man and did not like to be the cynosure of all eyes. The glass crashed to the tesserae as the uncle uttered a very unworthy word. "That was good of you." She continued in a warmer tone: "How many Belphins did you warn, then?" The Belphin appeared to think for a minute. Then he gave off a smile. "Oh, them," he said. "We know. They are harmless." "Just one. When you tell one something, you tell them all. You know that. Everyone knows that." "You certainly do have a wonderful intercommunication system," he murmured. you

<question>:
What is the relationship between the humans and the Belphins?

<options>:
A The Belphins made the humans their servants.
B The humans made the Belphins their servants.
C The Belphins rule over the humans.
D The humans rule over the Belphins.

<answer>:

C