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

<passage>:
In the outer doorway, backed by his clansmen, stood Groz, gazing first then he smiled, and asked, "Well, Groz? twilight, even as her love was about him. He stood rigid, trying to catch an echo of the Watcher's thoughts, but there was nothing. Perhaps the old man was resting. From the other direction, the long way that they two had come, it was not difficult to sense the thought of Groz. That thought was powerful, and heavy with "Hurry," said Neena. "They're closer than they were an hour ago." She was beautiful and defiant, facing the red sunset and the black mountain. Var sensed her fear, and the love that had conquered it. He felt a wave of tenderness and bitterness. For him she had come to this. "Wait," he commanded. While she waited he spun a dream, attaching it to the crags that loomed over the pass, and to the frozen ground underfoot. It was black night, as it would really be when Groz and his henchmen one alone might never have won through. It was starry night already when they saw the light from the Watcher's cave. The light shone watery and dim from beneath the hoary back of the glacier, and as they came nearer they saw why: the cave entrance was but neither had been here before. But this was no time for shyness. Var eyed the ice-curtain closely to make sure that it was real, not dream-stuff with his fist. It shattered and fell in a rain of splinters, sparkling in the light that poured from within. They felt the Watcher rouse, heard his footsteps, and finally saw him—a shrunken old man, white-haired, with a lined beardless face. The sight of him, more marred by age than anyone they had ever seen before, was against melting by the Watcher's will. Light blazed in reflections from the ice walls, till there was no shadow in the place. Behind them began spare it. We're pursued." "Yes, yes. You shall have what I can give you. Make yourselves comfortable, and in one minute.... Pursued, eh? A pity. I see the world Hot food and drink were before them almost at once. The Watcher regarded them with compassion as their eyes brightened and some of the shadow of very long, I'm sure, I would have performed some deed which Groz would behind us." "A pity, indeed. I would like to help you—but, you understand, I am the Mountain Watcher. I must be above feuds and families." "And what will you do now?" Var grinned mirthlessly. "We haven't much choice, since they're overtaking us. I have only one idea left: we can go where Groz may fear to follow us." "To the mountain, you mean." The old man said, "It is no part of my duty to dissuade you from this thing. You are free persons. But I must be sure that you know what you are doing. That is the second part of the law the First Watcher made: to "It is true," said the Watcher heavily. "In my youth I penetrated farther into the mountain than anyone before, farther even than did the First Watcher. I did not see the sleepers, nor will any man until they man wove a dream around them, and the bright ice-cave faded from their vision, and they saw— Along lightless streets, half choked with rubble and with the dead, poured a mad, hating horde. The recurrent flashes lit scarred faces, their deathless and lifeless sentinels round them, to wait till someone dare arouse them, or until their chosen time—no one knows surely. "I have told you the story you know, and have shown you a glimpse of the old time, because I must make sure that you do not approach the mountain looked grimly at the Watcher, and would have spoken but the Watcher seemed suddenly a very long way off, and Var could no longer feel his sleep had refreshed his mind and body—realizing also that a footstep had wakened him. Across the cave he faced a young man who watched him coolly with dark piercing eyes that were familiar though he did not know the face. Neena sat up and stifled a cry of fright. Var growled, "Who are you? Where's the Watcher?" The other flashed white teeth in a smile. "I'm the Watcher," he answered. "Often I become a youth at morning, and relax into age as the day passes. A foolish amusement, no doubt, but amusements are few here." "You made us fall asleep. Groz will be on us—" "Groz and his people could not detect your thoughts as you slept. They were all night chasing elusive dreams on the high ridges, miles away." dashed from rock to rock in its struggle toward the plain, but the curling fog hid everything. "You have an alternative," said the Watcher crisply. The two took their eyes from the black mountain and gazed at him in sudden hope, but his face was unsmiling. "It is this. You, Var, can flee up the canyon to the north, by a way I will show you, disguising your thoughts and masking your presence as well as you are able, while the girl goes in the other direction, southward, without seeking to conceal herself. Your pursuers will be deceived and follow her, and by the time they catch her it will be too late for them to overtake Var." That possibility had not occurred to them at all. Var and Neena looked last on the cindery slope of the great volcanic cone, they sensed that the pursuit already halved their lead. They stood high on the side of the Ryzga mountain, and gazed at the doorway. It was an opaque yet penetrable well of darkness, opening into the face of a lava cliff, closed only by an intangible curtain—so little had the Ryzgas feared those who might assail them in their sleep. Var sent his thoughts probing beyond the curtain, listened intently, they could not see, stood Groz. He shook the staff he carried. It was thought he hurled at them was a soundless bellow: "Young fools! I've caught you now!" Behind Groz the figures of his followers loomed up as striding shadows. Neena's hand tightened on Var's. Var sent a thought of defiance: "Go back! Or you'll drive us to enter the mountain!" Groz seemed to hesitate. Then he swung his staff up like a weapon, and grip of the illusion and the world seemed to right itself. The mist billowed again and Groz was out of sight, but they could hear him exhorting his men to haste. further on, they stumbled over a pile of charred bones. Someone else had made it only this far. It was farther than the Watcher had gone into these uncharted regions, and only the utmost alertness of mind and sense had saved them from death in traps like this. But as yet the way was not might be near at hand. From behind, up the tunnel, came a clear involuntary thought of dismay, that of Groz, like the grip of two strong wrestlers. In that grip each neither would yield, though the mountain above them and the world outside should crumble to ruin around them. "Follow us, then!" For long moments they forgot the pursuit, forgot everything in wonder at this place whose remotest like they had never seen in the simplicity of That, and his movements when he came slowly down the ramp toward them, conveyed a queer suggestion of weariness or weakness, as if he were yet interlopers with the dispassionate gaze of a scientist examining a new, but not novel, species of insect. His thoughts seemed to click, like metal parts of a mechanism falling into places prepared for them. The crawling, laboring to do the Ryzgas' will— toward the stars, the the Ryzga's frantic eyes. They glared back at him with such hatred and such evil that for an instant he almost faltered. But the Ryzga's

<question>:
Why does Groz not want to go into the mountain?

<options>:
A He does not want to get separated from his team
B He is scared of the wildlife that might try to attack
C He is nervous about the technology left behind
D He knows it will be hard to see the people he is chasing

<answer>:

C