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. from the steady whining Rikud had heard all twenty-five years of his life, to the sullen roar that came to his ears now, the feelings had grown. "There is Rikud on the floor!" disturbed Rikud, although he could not tell why. And, because he had realized this odd difference in himself, he kept it locked up inside him. Tugging at the handle of the door, Rikud pulled himself upright. Something small and brown scurried across the other side of the "Where's the buzzer?" he sobbed. "I must find the buzzer." Crifer's voice, from the darkness inside, said, "You broke it. You broke it. And now we will break you—" Rikud got up and ran. He reached the door again and then he slipped down against it, exhausted. Behind him, the voices and the footsteps Rikud sat down and tore off a piece of a plant, munching on it. It was good. There was a strange thought, and Rikud's brain 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 frightening doors and women by appointment only. Rikud felt at home. that was silly, because now no one told you to do anything. You only listened to the buzzer. And Rikud could remember the rest of what the reading machine had said. elders were overthrown. Here Rikud had been lost utterly. The people had decided that they did not know where they were going, or why, and that it was unfair that the elders alone had this authority. They were born and they lived and they died as the elders directed, like little cogs in a great machine. Much of this Rikud could not understand, but he knew enough to realize that the reading machine had sided with the medicine. But when, in another ten years, Chuls would perish of old age, the rays would no longer suffice. Nothing would, for Chuls. Rikud 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. about and talked. That was the custom. Everyone did it. But if he wasn't reading himself, Rikud usually went to sleep. All the intervals by a sharp booming. Change— "Won't you eat, Rikud?" Chuls called from somewhere down below. "Damn the man," Rikud thought. Then aloud: "Yes, I'll eat. Later." they find the nature of that purpose? "I will eat," Chuls said, breaking Rikud's revery. Yet he did have initiative after a sort. He knew when to eat. Because he was hungry. And Rikud, too, was hungry. Differently. Rikud heard a voice not unlike that of the reading machine. He missed the beginning, but then: —therefore, permit no unauthorized persons to go through this Rikud gave the voice up as hopeless. There were too many confusing words. What in the world was an unauthorized person? More interesting 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 through the little room with the confusing voice to Crifer. walk and then might find himself in the garden. It was so big. Three or four days passed before Rikud calmed himself enough to talk about his experience. When he did, only Crifer seemed at all interested, yet the lame-footed man's mind was inadequate to cope with In a moment, the room was cleared. Rikud stood alone. He cleared his throat and listened to the sound, all by itself in the stillness. What would have happened if they hadn't retired? But they always did things buzzer, bathed in the health-rays with it, slept with it. What would they do if the buzzer stopped buzzing? This frightened Rikud, although he didn't know why. He'd like it, though. Maybe then he could take them outside with him to the big spinning and humming. He watched for he knew not how long. And then he 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 was clearly an "unauthorized person." He had heard the voice again upon entering the room. under his blows, shattered by the strength of his arm. Almost casually he strode about the room, but his blows were not casual. Soon his easy strides had given way to frenzied running. Rikud darkness, something bright flashed briefly through the sky and was gone. Whimpering, he fled. All around Rikud were darkness and hunger and thirst. The buzzer did not sound because Rikud had silenced it forever. And no one went to eat or drink. Rikud himself had fumbled through the blackness and the whimpering to the dining room, his tongue dry and swollen, but the smooth belt that flowed with water and with savory dishes did not run any more. The machinery, Rikud realized, also was responsible for food. "We will eat and we will drink when the buzzer tells us," Wilm replied 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." beyond the viewport." "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." There was a lot of noise in the darkness, and someone else said, "I 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 had a woman, too. He wondered if it was dark and hungry in the women's "We can eat if the buzzer sounds, but it is broken," Chuls said dully. 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." "We must go outside—through the viewport." Rikud listened to the odd A hand reached out in the darkness and grabbed at his head. He heard Crifer's voice. "I have Rikud's head." The voice was nasty, hostile. Crifer, more than anyone, had been his friend. But now that he had broken the machinery, Crifer was his enemy, because Crifer came nearer to understanding the situation than anyone except Rikud. 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 he did not like the sound of the angry voices. Someone said, "Let us 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. It was dark and he was hungry and everyone who was strong enough to run die because he had no food and no water and his stomach gurgled and 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 does everyone begin to starve and grow thirsty?

<options>:
A Without the buzzer, there is no food or drink to have.
B The buzzer no longer works, and no one knows how to fix it.
C Rikud broke the buzzer, and they're all waiting.
D Rikud broke the buzzer, and without it they don't know how to care for themselves.

<answer>:

D