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

<passage>:
people. Rikud and his people across the darkness and the stars for all Rikud's lifetime and more. Every day for a week now, Rikud had come to the viewport to watch the great changeless sweep of space. He could not quite explain the feelings within him they were so alien, so unnatural. But ever since the engines somewhere in the rear of the world had changed their tone, 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 disturbed Rikud, although he could not tell why. And, because he had realized this odd difference in himself, he kept it locked up inside Rikud screamed and hurtled back through the corridor, and his face him. apparent in the speckled profusion Rikud had always known. Instead, If he had understood the term, Rikud would have told himself this was odd. His head ached with the half-born thought. It was—it was—what was it? Rikud got up and ran. He reached the door again and then he slipped His head whirled and the viewport seemed to swim in a haze. Could it be variable, as Crifer had suggested? He wondered if the scurrying Rikud knew he should be exercising now, or bathing in the rays of the brown thing waited somewhere, and nausea struck at the pit of his Chuls' reminder fostered uneasiness. Often Rikud had dreamed of the as his mate? The first time this idea had occurred to him, Rikud ignored it. But it came again, and each time it left him with a feeling he could not explain. Why should he think thoughts that no other man had? Why should he think he was thinking such thoughts, when it always embroiled him in a hopeless, infinite confusion that left him with a headache? His voice trailed off. Rikud knew that something which he could not explain had entered the elder man's head for a moment, but it had Rikud muttered to himself and undressed. The world had begun to annoy him. Now why shouldn't a man be permitted to do what he wanted, when Rikud sat down and tore off a piece of a plant, munching on it. It was are variable. I don't hate you now, Rikud." There was a strange thought, and Rikud's brain whirled once more down the tortuous course of half-formed questions and unsatisfactory answers. he wanted to do it? exciting. He liked them. He liked the garden, for all its hugeness. With so many people, and especially now with women, he was not afraid. It was much better than the small world of machinery, buzzer, frightening doors and women by appointment only. Rikud felt at home. Rikud had been stopped in this action, although there was no real They were strangely shaped in some ways, and yet in others completely human, and their voices were high, like singing. Rikud found them oddly And Rikud could remember the rest of what the reading machine had said. elders were overthrown. Here Rikud had been lost utterly. The people before Rikud's time, had negated the necessity for a knowledge of proved the world was not perfect. Rikud was guiltily glad when he saw But if he wasn't reading himself, Rikud usually went to sleep. All the changing." "Changing?" Crifer questioned the fuzzy concept as much as he questioned what it might mean in this particular case. "Well, it's wrong. Variability and change are two words without meaning." "People grow old," Rikud suggested. concepts, yet it was so clear. Or was it? He had had it a moment ago, but now it faded, and change and old were just two words. His own buzzer sounded a moment later, and it was with a strange He had been told about them and he had seen pictures, and he dimly 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. The view had changed, and the strangeness of it made Rikud's pulses 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 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 not exist confusing than ever. "Chuls," he called, remembering, "come here." Rikud whirled on the little figure and pointed to the swirling cloud of Anger welled up inside Rikud. "All right," he said, "listen. What do besides, Rikud had the distinct feeling that here was something far Rikud sat down hard. He blinked. For a whole week that view did not change, and Rikud had come to accept word seemed all wrong to Rikud, but he could think of no other, unless Rikud regretted that he never had had the chance to read that book on reading machine had begun to bore him. He said, "Well, variable or not, our whole perspective has changed." obvious. If he, Rikud, walked from one part of the world to another, Rikud heard a voice not unlike that of the reading machine. Rikud gave the voice up as hopeless. There were too many confusing When he opened the door a strange new noise filled his ears, a gentle humming, punctuated by a throb-throb-throb gears and wheels and nameless things all strange and beautiful because they shone with a luster unfamiliar to him. "Odd," Rikud said aloud. Then he thought, "Now there's a good word, but no one quite seems to know its meaning." Only this one was different. In it Rikud saw the viewport. But how? The Then he trembled. What would he do out in the garden? He couldn't go alone. He'd die of the strangeness. It was a silly thought no one ever died of anything until he was a hundred. Rikud Three or four days passed before Rikud calmed himself enough to "Well, I won't go," Chuls replied. "There's no reason to go. If Rikud A buzzer sounded and automatically Rikud found himself releasing Chuls. In a moment, the room was cleared. Rikud stood alone. He cleared his What would they do if the buzzer stopped buzzing? This frightened Rikud, although he didn't know why. He'd like it, Rikud heard the throbbing again as he stood in the room of the casual. Soon his easy strides had given way to frenzied running. Rikud Rikud never wanted to do anything more than he wanted to open that All around Rikud were darkness and hunger and thirst. The buzzer did eat or drink. Rikud himself had fumbled through the blackness and the "It won't any more," Rikud said. thing you did, Rikud." 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 "No," Rikud assured him. "It won't." do to Rikud what he said he did to the machinery." Rikud ran. In the weak to rise. Rikud, too, felt a strange light-headedness and a gnawing He became sickly giddy thinking about it. But if he didn't open the door and go into the garden outside, he would die because he had no food and no water and his stomach gurgled and Rikud tripped over something and sprawled awkwardly across the floor.

<question>:
How does Rikud change through the story?

<options>:
A He questions his world, his lack of autonomy, and what it really means to live.
B He realizes that he will one day have a mate chosen for him, and children as well.
C He realizes his desire to feel pain, and to hurt for the first time.
D He questions his "strange" thoughts, and how pervasive they are.

<answer>:

A