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

<passage>:
"There is no mystery," Ravdin said softly. "We stayed behind into the last slow arc toward the Earth's surface. Stretching his arms and legs, he tried to relax and ease the tension in back to the landing operation. He was still numb and shaken from the Warp-passage, his mind still muddled by the abrupt The station was completely empty as Ravdin walked down anticipating his return, would not be at the concert. Riding the shuttle over the edges of Jungle-land toward the Ravdin and Dana stood there, trancelike, staring transfixed Ravdin and Dana. His voice was a raging storm of bitterness "Take them out! Whip them, burn them, do anything! But find out where their people have gone. Find out! Music! We'll take the music out of them, once and for all." The inquisition had been horrible. Their minds had had no have found us so soon, unless they too have discovered the Warp and how to use it to travel." The older man's breath cut off sharply, and there was real alarm in his eyes. "You're right," he said softly. "Six months before him, he let out one hoarse, agonized scream of frustration and defeat. on a cold stone ledge, blinking dumbly at each other as the But strangely enough he did not kill them. He left them the dark night sky. Naked, they sat alone on the planet of the The scout looked up at Nehmon in desperation. "But what can we do? We have only weeks, maybe days, before they're here. We have no time to plan, no time to prepare for them. Jungle-land. They knew no words, no music, nothing. And they have come so close." What can we do?" ships of his fleet rose one by one and vanished like fireflies in did not even know that in the departing ships a seed had been The two sat dumbly, shivering. Far in the distance, a beast quiet. Not a breath of air stirred in the city. Ravdin stared out of them grunted, and moved into the dry darkness of the cave. in bitter silence. "Yes, we can run away. Just as we always have before. After we have worked so hard, accomplished so Blinking dully, the woman crept into the cave after him. forgotten as completely as if he had never been. No thoughts of the Hunters, either, nor of their unheard-of mercy in leaving in this green Jungle-land, but lives nonetheless. and we run. From what? We run from the Hunters. They're us , these Hunters. They've never quite found us, because we've always already run. We're clever, we're fortunate, and we have a way of life that they do not, so whenever they have come close to finding us, we have run." Nehmon nodded slowly. "For thousands of years." running like frightened animals in the shadows of night and that eons ago our remote ancestors fought the Hunters, and lost, and fled, and were pursued. But why do we keep running? Time after time we've been cornered, and we've turned and fled. Why? and now we must run from the Hunters who continue to fight that true? We kill the tiger-beasts in the Jungle to protect "The concert's over!" Ravdin walked to the window, feeling Ravdin turned away from his bride. "Tell her," he said to ! The transference was perfect." She turned to face the old man. "It's taken so long to come this far, Nehmon. So much work, so much training to reach a were undisturbed for a thousand years, and before that, four thousand. But time. This time they will catch us. Or the next time, or the next. And that will be the end of everything for us, unless we fight them." He paused, watching the last groups dispersing on the street below. "If we only knew, for certain, what we were saw them, or my great-grandfather, somewhere back there. It's been thousands of years." "Yet we've been tearing ourselves up by the roots, fleeing from planet to planet, running and dying and still running. But suppose we don't need to run anymore?" He stared at her. "They keep coming. They keep searching them for thousands of years ?" could be lost completely, tortured, killed. If they haven't changed, you wouldn't stand a chance. You'd never come At the edge of the Jungle-land a great beast stood with the people made the short safari across the intervening jungle to the circles of their ships. Husbands, wives, fathers, mothers—all carried their small, frail remembrances out to the ships. There was music among them still, but it was a different sort of music, now, an eerie, hopeless music that drifted out of the thought to thought, from voice to voice as the people of the city wearily prepared themselves once again for the long journey. To run away. In the darkness of secrecy, to be gone, without a trace, without symbol or vestige of their presence, leaving only the scorched circle of land for the jungle to reclaim, so that no eyes, not even the sharpest, would ever know how long they had stayed, nor where they might have gone. the last of his belongings, a few remembrances, nothing more, because the space on the ships must take people, not remembrances, and he knew that the remembrances would bring only preparation, following plans laid down millennia before. He saw the libraries and records transported, mile upon endless mile of microfilm, carted to the ships prepared to carry them, stored until a new resting place was found. The history of a people was recorded on that film, a people once proud and strong, now equally proud, but dwindling in numbers as toll to run, Nehmon knew, if they were to survive. And with a blaze of anger in his heart, he almost hated the two young people waiting here with him for the last ship to be begged, tried to persuade them that there was no hope, that the very idea of remaining behind or trying to contact the "You'll have to go soon," he said. "The city will be burned, of course, as always. You'll be left with food, and with weapons against the jungle. The Hunters will know that we've been here, but they'll not know when, nor where we have gone." He paused. "It will be up to you to see that they don't learn." back, once you do that. You would never regain your memory. You must save it for a last resort." Down below on the street the last groups of people were passing the last sweet, eerie tones of the concert were rising in the gathering twilight. Soon the last families would have taken their refuge in the ships, waiting for Nehmon to trigger the fire bombs to ignite the beautiful city after the ships started on their voyage. The concerts were over there would be long years of aimless wandering before another home could be found, another planet safe from the Hunters and their ships. Even then it would be more years before the concerts could again rise from their hearts and throats and minds, generations before they could begin work again toward the climactic expression of their heritage. Hunters sneered and ridiculed, and then grew to hate Ravdin's They stood in the Jungle-land, listening to the scurry of frightened animals, and shivering in the cool night air as the Jungle-land crept to their ears, first frightened, then curious, stood. Bit by bit the Jungle-land gathered courage, and the to the earth as powerful, flaming jets. They were squat, misshapen vessels, circling down like vultures, hissing, screeching, landing with a grinding crash in the at ready. Ravdin and Dana were seized and led to the As they approached it, their hearts sank and they clasped hands to bolster their failing hope. they've gone, and yet you remain behind. There must be a reason for such rashness. Are you sick? Crippled?"

<question>:
Why did Ravdin and Dana enter a cave in the jungle at the end of the story?

<options>:
A To hide from their society so they could meet the Hunters
B To flee from the Hunters' inquisition
C They had wiped their own minds, becoming uncivilized
D To wait for their society to return and pick them up

<answer>:

C