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

<passage>:
As the years went by, Martin began to lose even his detached interest Nobody in the neighborhood was surprised when Martin's mother cousin's utter disgust. "Eat, drink and be merry, or whatever you Romans say when you do as you do," the cousin—who was rather woolly in history off without them. Martin was no exception. He'd never had it this good while he was living with his old lady. As for his father, Martin Martin showed his work in Italy, so that the cousin could be disillusioned by the current crop of Romans. He found that neither purpose nor malice was enough the descendants were scraping bottom now—advised. understand. "Where do you suppose Conrad has been all this time?" Martin idly asked the current cousin—who was passing as his nephew by now. The young man jumped, then glanced around him uncomfortably. "Conrad's with Ninian, though, because when he pushed her too far, she would cry instead of mopping up the floor with him. "But I can't understand," he would say, keeping his face straight. "Why do you have to come from the future to protect me against your cousin "Oh, I see," Martin said. He had often fancied that Conrad would prove to be the most stimulating member of the whole generation. But it seemed unlikely that he would "Oh, just don't ask any questions," Ninian said petulantly. "When you get older, someone will explain the whole thing to you." So Martin held his peace, because, on the whole, he liked things the to know what gave. They tried talking to Ninian, but she certainly knew how to give them the cold shoulder. One day the truant officer came to ask why Martin hadn't been coming to school. Very few of the neighborhood kids attended classes very regularly, so this was just routine. But Ninian didn't know that and she went into a real tizzy, babbling that Martin had been sick and would make up the work. Martin nearly did get sick from laughing so hard inside. same way, only she didn't know that, either. She was really pretty dumb, Martin thought, for all her fancy lingo. "It's so hard to think these things out without any prior practical application to go by," she told him. When it became clear that his mother was never going to show up again, And keep an eye on him she did—she or a rather foppish young man who came to stay with them occasionally. Martin was told to call him Uncle Bartholomew and Olaf, Aunts Ottillie and Grania and Lalage, and many more—all cousins to one another, he was told, all descendants of his. Martin was never left alone for a minute. He wasn't allowed to play with the other kids in the new neighborhood. Not that their parents would have let them, anyway. The adults obviously figured that if a one-car family hired private tutors for their kid, there must be something pretty wrong with him. So Martin and Ninian were just as Martin missed the old neighborhood, though. He missed having other kids to play with. He even missed his mother. Sure, she hadn't given him enough to eat and she'd beaten him up so hard sometimes that she'd They made no bones about the fact that they were there only to carry When Martin was sixteen, Raymond took him aside for the talk Ninian had promised five years before. "The whole thing's all my brother Conrad's fault. You see, he's an idealist," Raymond explained, pronouncing the last word with distaste. Martin nodded gravely. He was a quiet boy now, his brief past a dim and and I'm sure someday everything will come out all right. However, Conrad is so impatient." "I thought, in your world, machines did all the work," Martin suggested. "I've told you—our world is precisely the same as this one!" Raymond "I'm trying to talk to you as if you were an adult," Raymond said, "but if you will persist in these childish interruptions—" "I'm sorry," Martin said. But he wasn't, for by now he had little respect left for any of his descendants. They were all exceedingly handsome and cultivated "Oh, I do!" Martin said. He had pieced the whole thing together for himself long since, but he wanted to hear how Raymond would put it. "Unfortunately, Professor Farkas has just perfected the time "Sounds like a good way of dealing with the problem," Martin observed. Raymond looked annoyed. "It's the cousins possessed to a consternating degree. Martin had, of course, no illusions on that score he had learned long assistants," Raymond continued, as if Martin had answered, "and—ah—induced a handicraft enthusiast to build the gadget for us." Martin inspected the system and made one or two changes in the wiring her own inadequacy, Martin knew, not of sorrow. He was getting skillful at understanding his descendants, far better than they at understanding dozen years later, they weren't touched. Martin was never sure whether this had been sheer luck or expert planning. Probably luck, because his carefully chosen by Raymond and disputed by Martin, for, to the man from the future, all available artifacts were antiques. Otherwise, Martin accepted his new surroundings. His sense of wonder had become "No," Martin smiled, feeling rather silly, "but it would make the place seem safer somehow." During those early years, Martin's tutors were exchanged for the higher-degreed ones that were now needful. The question inevitably least twenty of the cousins came back through time to hold one of their vigorous family councils. Martin was still young enough to enjoy such occasions, finding them vastly superior to all other forms of entertainment. "This sort of problem wouldn't arise in our day, Martin," Raymond commented as he took his place at the head of the table, "because, "Don't be a fool, Grania!" Raymond snapped. "Well, Martin, have you "Might mess up our time frightfully," Bartholomew contributed, "though, to be perfectly frank, I can't quite understand how." "I am not going to sit down and explain the whole thing to you all over again, Bart!" Raymond said impatiently. "Well, Martin?" "What would you suggest?" Martin asked. But the fear did not show in Martin's pictures. They were pretty pictures. Cousin Ives—now that Martin was older, he was told to call the man failed, he got worried and decided that what Martin needed was a he couldn't seem to identify with his own time any more. The other cousins appeared to find the yacht a congenial head-quarters, largely because they could spend so much time far away from the contemporary inhabitants of the planet and relax and be themselves. So ended in a brawl, because one cousin was sure to accuse another of having got advance information about the results. Martin didn't care much for their company and associated with them only they were gregarious young people for the most part, they didn't court his society. He suspected that he made them feel uncomfortable. couldn't even seem to care. During all this time, Conrad still did not put in an appearance. Martin wished his descendant would show up, so there would be some excitement. But he didn't come. And Martin got to thinking.... He always felt that if any of the cousins could have come to realize the basic flaw in the elaborate plan they had concocted, it would have continent, a hundred years or more before the date of his birth. A great many of the cousins turned up at the simple ceremony. All were cousin from the future they were afraid he might prove rather stuffy about the entire undertaking. But Martin disagreed. a while, Martin couldn't tell one from another. Cousin after cousin came to watch over him and eventually they were as hard for him to tell All the cousins were young, for, though they came at different times in his life, they had all started out from the same time in theirs. Only the young ones had been included in the venture they did not trust their elders.

<question>:
Why doesn't Martin explain the flaw in the plan to the cousins?

<options>:
A Martin resents the cousins for taking Ninian away from him.
B They have been very generous. Martin is afraid they'll leave, and he won't be wealthy anymore.
C Martin does not want the future generations to turn out like his descendants.
D Martin finds the cousins very irritating. If they can't figure it out, why should he explain it?

<answer>:

C