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

<passage>:
Rikud looked out upon the garden and he trembled. Out there was life. heard the voices again, and soon a foot and then another pounded on from the steady whining Rikud had heard all twenty-five years of his "There is Rikud on the floor!" life, to the sullen roar that came to his ears now, the feelings had grown. Tugging at the handle of the door, Rikud pulled himself upright. the metal of the passage. He heard Crifer's voice louder than the rest: Something small and brown scurried across the other side of the disturbed Rikud, although he could not tell why. And, because he had If anyone else had noticed the change, he failed to mention it. This Rikud knew he should be exercising now, or bathing in the rays of the health-lamps. It had never occurred to him that he didn't feel like it he just didn't, without comprehending. weight of his body with all his strength against the door. It opened and he stepped outside into the warmth. The air was fresh, fresher than any air Rikud had ever breathed. He Rikud muttered to himself and undressed. The world had begun to annoy good. Crifer picked his head up, from the water, his chin wet. "Even feelings are variable. I don't hate you now, Rikud." Rikud smiled, staring at the ship. "People are variable, too, Crifer. Rikud sat down and tore off a piece of a plant, munching on it. It was It was much better than the small world of machinery, buzzer, frightening doors and women by appointment only. Rikud felt at home. again, something which was as impalpable as air. Rikud had been stopped in this action, although there was no real authority to stop him. This puzzled him, because somehow he felt that he knew enough to realize that the reading machine had sided with the people against the elders, and it said the people had won. Now in the health room, Rikud felt a warmth in the rays. Grudgingly, he had to admit to himself that it was not unpleasant. He could see the look of easy contentment on Chuls' face as the rays fanned down upon him, bathing his old body in a forgotten magic which, many generations before Rikud's time, had negated the necessity for a knowledge of medicine. But when, in another ten years, Chuls would perish of old age, the rays would no longer suffice. Nothing would, for Chuls. Rikud Under the tube at Rikud's left lay Crifer. The man was short and heavy Rikud looked at that foot, it was with a sense of satisfaction. True, this was the only case of its kind, the exception to the rule, but it proved the world was not perfect. Rikud was guiltily glad when he saw Crifer limp. But, if anyone else saw it, he never said a word. Not even Crifer. Now Crifer said, "I've been reading again, Rikud." This was a new thought to Rikud, and he propped his head up on one elbow. "What did you find out?" remembered his childhood among women. But his feelings had changed this was different. Again there were inexplicable feelings—strange channelings of Rikud's energy in new and confusing directions. He shrugged and reserved the thought for later. He wanted to see the The view had changed, and the strangeness of it made Rikud's pulses leap with excitement. All the stars were paler now than before, and where Rikud had seen the one bright central star, he now saw a globe of light, white with a tinge of blue in it, and so bright that it hurt his eyes to look. Yes, hurt! Rikud looked and looked until his eyes teared and he had to turn away. Here was an unknown factor which the perfect world failed Rikud couldn't remember, and he suddenly wished he could read Crifer's book on astronomy, which meant the same as stars. Except that it was variable, which was like change, being tied up somehow with age. Presently Rikud became aware that his eyes were not tearing any longer, and he turned to look at the viewport. What he saw now was so new that he couldn't at first accept it. Instead, he blinked and rubbed his "Won't you eat, Rikud?" Chuls called from somewhere down below. "Damn the man," Rikud thought. Then aloud: "Yes, I'll eat. Later." But Rikud forgot the old man completely. A new idea occurred to him, and for a while he struggled with it. What he saw—what he had always seen, except that now there was the added factor of change—perhaps did "What else?" "Else? Nothing." Anger welled up inside Rikud. "All right," he said, "listen. What do you hear?" Rikud sat down hard. He blinked. For a whole week that view did not change, and Rikud had come to accept And Rikud, too, was hungry. they shone with a luster unfamiliar to him. "Odd," Rikud said aloud. Then he thought, "Now there's a good word, but not dare once to look back. He stood shaking at Crifer's side, and Crifer, but had no lame foot. Crifer hobbled about on his good foot, doing a meaningless little jig. Crifer hopped up and down. "Look what Rikud's doing! I don't know what them watched Crifer jump up and down, but most of them watched Rikud This frightened Rikud, although he didn't know why. He'd like it, could huddle close to them and he wouldn't be alone. Rikud heard the throbbing again as he stood in the room of the began to wonder. If he destroyed the wheels and the cogs and the gears, would the buzzer stop? It probably would, because, as Rikud saw it, he confidently. "It won't any more," Rikud said. "What won't?" "The buzzer will never sound again. I broke it." Crifer growled. "I know. You shouldn't have done it. That was a bad thing you did, Rikud." "It was not bad. The world has moved through the blackness and the "That's ridiculous," Chuls said. Even Crifer now was angry at Rikud. "He broke the buzzer and no one can eat. I hate Rikud, I think." hate Rikud." Then everyone was saying it. Rikud was sad. Soon he would die, because no one would go outside with him and he could not go outside alone. In five more years he would have Crifer shrilled, "Maybe it is only variable and will buzz again." "No," Rikud assured him. "It won't." "Then you broke it and I hate you," said Crifer. "We should break you, too, to show you how it is to be broken." Crifer's voice. "I have Rikud's head." The voice was nasty, hostile. to understanding the situation than anyone except Rikud. The hand reached out again, and it struck Rikud hard across the face. "I hit him! I hit him!" Other hands reached out, and Rikud stumbled. He fell and then someone was on top of him, and he struggled. He rolled and was up again, and weak to rise. Rikud, too, felt a strange light-headedness and a gnawing hurt in his stomach. But it didn't matter. He heard the angry voices and the feet pounding behind him, and he wanted only to get away. Rikud tripped over something and sprawled awkwardly across the floor. He felt a sharp hurt in his head, and when he reached up to touch it with his hands there in the darkness, his fingers came away wet. break him.

<question>:
Why is Rikud oddly satisfied about Crifer's limp foot?

<options>:
A It's new and interesting. Rikud is tired of the regular.
B It means that people can hurt, which Rikud has an interest in.
C He dislikes Crifer, and enjoys the fact that he is stuck with an anomaly.
D It's evidence that imperfections still exist, and validates Rikud's feelings.

<answer>:

D