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

<passage>:
STRANGE EXODUS By ROBERT ABERNATHY Gigantic, mindless, the Monsters had come out of this gutted cosmic carcass, could humanity flee? Westover got a shock when he stumbled onto the monster, for all that he knew one had been through here. He had been following the high ground toward the hills, alternately splashing through waist-deep water and climbing onto comparatively dry the slime that covered a surface faintly, horrifyingly resilient. He recoiled as if seared, and retreated, slithering in the muck. For moments his mind was full of dark formless panic ponderous repose across the river valley, its head and tail spilling over the hills on either side, five miles apart. The beast was quiescent until morning—sleeping, if such things slept. Westover stood motionless in the blackness how long, he did not know. He was hardly aware of the water that covered his feet, crept over his ankles, and swirled halfway to his knees. Only the emergence of the moon through a rift of the cloud blanket brought him awake scattered black hummocks—crests of knolls like that on which he stood, all soon to be hidden by the rising flood. For a moment he knew despair. The way back was impassable, and the way nights without stopping came to his rescue. Westover plodded forward, pressed his shrinking body against the slimy, faintly warm surface of the monster's foot, and sought above him with upstretched hands—found Some time after he had found courage to resume the climb, he dragged himself, gasping and quivering, to comparative safety on the broad steep that rose to the summit of the monster's humped back, a mountain to be climbed. Westover felt poignantly that his exhausted body could not make that ascent and face the long and dangerous descent beyond, which he had to make before dawn ... but not now ... not now.... He lay in a state between waking and dreaming, high on the monster's side Westover had been one of the men who, in the days when humanity was Westover no longer saw the murky moonlight, the far faint glitter of from star to star in search of food, guided by instinct to suns and worlds like ours. Descending on such a planet, they move across its surface systematically ingesting all edible material—all life not mobile enough to avoid their march. They are like caterpillars that of civilization, and the end will be far more terrible than if we were all devoured by the monsters." Westover awoke, feeling himself bathed by the cold sweat of nightmare—then he realized that a misty rain had wetted his face and made his mind clearer than it had been for days, and he remembered that he could not sleep but had to go on, searching with a hope that would not die for some miraculously spared refuge where civilization and science might yet exist, where there would be the means to realize his Even as Westover began frantically climbing, out of that lightening monster would begin to move, to crawl eastward impelled by the same dim around the Earth, gutting the continents and churning the sea bottoms, and by now whatever was left of human civilization must be starving beyond the Arctic circle, or aboard ships at sea. The hordes that still lived and wandered over the once populous fertile lands, like this—would not live long. For a man like Westover, who had been a scientist, it was not the toward the monster's head. He could stay where he was unharmed, of course. On the monster's back, of all places, he had nothing to fear from it or from others of its kind. But he knew with desperate clarity that by nightfall, when the beast became still once more, exhaustion and growing hunger would have made him unable to descend. As he lay where he had fallen, he felt that had kept him doggedly plodding forward. Again he lay half conscious, in a lethargy that unchecked must grow steadily deeper until death. Isolated thoughts floated through his head. It occurred to him that he was now ideally located to conduct the experiments necessary to prove his theory of how to destroy the laboratory on the monster's back. Of course the rolling motion would With a struggle Westover roused himself, first sitting up, then swaying were gray and unappetizing, but he knew from the studies he had helped Sutton make that the monsters, extraterrestrial though they were, were lay torpidly drowsing, lulled by the long sway, arms over his head to protect him from the sun's baking, merely that he was chained to the only source of food he knew in all the world—not just that he was steady, ravenous march to the east. But there was no motion Westover's mind was beginning to function again upon him. He knew now that he had been almost insane for the time he had passed here, touched by the madness that takes hermits and men lost in deserts or oceans. And his was a stranger solitude than any of those. Now he listened strainingly to the portentous sounds of change in the and that could be expelled to drive the monster in flight like a The monster on which Westover had been living as a parasite was further that he must finally leave it—now or never—or be borne aloft of the sea. While he slept the monster had crept beyond the coast Of course—the great beast would crawl into the sea, which would float He should have foreseen that and made his escape in time. Now that Westover sat for a space with head in hands, hearing the faint Then he sprang to his feet, gripping his hand-ax, and ran panting to the place where he had dug for food. His excavations tended to close and heal overnight now he went to work with vicious strokes enlarging "Who are you?" asked Westover, breathlessly but almost without surprise. Westover hesitated. "I'm not just imagining you?" he appealed. Westover was still not sure that the other was more than one of the nodded in childlike obedience, and followed. When, a few hundred yards nearer the monster's head, the other halted into utter blackness—Westover knew that both the Preacher and his own and Westover climbed to his feet and stood, weak-kneed still, staring told Westover better than words that there was something hugely he and Westover froze in dumbfounded recognition. quick eyes studied Westover's face, and he gestured toward a packing "I stumbled onto it," Westover admitted. "I was wandering across country—my plane crashed on the way back from that South American Westover finished the brief account of his coming to dwell on the "I haven't got so far with the theory," said Westover, "but I think "Then," Westover glanced appreciatively around, "it looks like the main hazard is claustrophobia." "Don't worry about a cave-in. We're surrounded by solid cystoid tissue. But," Sutton's voice took on a graver note, "there may be other psychological dangers. I don't think all our people—there are Westover flexed his hands involuntarily, like one who has been too the plan that had burned in him during his bitter wandering over the face of the ruined land. It would be very easy to accomplish from an endoparasite's point of vantage, merely by isolating from Westover stared. "Why?" "No! Of course I realize—Well, I see what you mean—I think." Westover we'll do better to model ourselves on the humble tapeworm. "Your idea is dangerous for the same reason. The monsters probably spend thousands of years in interstellar space during that time Westover bowed his head, but he had caught a curiously expectant glint the end, I see.... This phase of our history won't last forever. Eventually, the monsters will come to another planet not too unlike

<question>:
Why would it be a bad idea for Westover to disembark the monster when he realized where its next big destination was?

<options>:
A He would end up trapped in the desert
B He would be stranded on the island
C He wouldn't be able to reach land
D He would end up nearby a camp of dangerous humans

<answer>:

C