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

<passage>:
The colony had grown to near self-sufficiency, lacked adequate medical and research facilities. Not all the world’s citizens were content. when Zarwell arrived that monkey on his back Under the cloud of cast-off identities lay the shape of another man— was it himself? By CHARLES V. DE VET “So that’s our big, bad man,” a Who he was, and what he was doing here, was clouded. The truth lurked coarse voice above him observed [p ] caustically. “He doesn’t look so “It might have been better to kill him right away,” a second, less confident voice said. “It’s supposed to be impossible to hold him.” negligently against a stone pillar, to his right but within vision, straightened and barked an order “What do you think they’ll do “Execute him, I suppose,” the harsh voice said matter-of-factly. “They’re probably just curious to with him?” observe his surroundings. It was a mistake. “He’s out of against the locker at the spaceport. Irrelevantly he wondered how he Zarwell did not deign to acknowledge Zarwell followed his gaze to where from him Zarwell had unobtrusively with an instinctive motion. Until that instant he had intended to fight. Now he swiftly reassessed the odds. There were five of them, he saw. He should be able to incapacitate two or three Zarwell told him. that others would very probably be waiting outside. His best course now was to sham ignorance. He relaxed. He offered no resistance as they they had been expecting him meant The man’s mouth opened and he tried to yell as he threw himself frantically backward. He clawed at reached him. with perspiration and body oil, grabbed him by the jacket and drove his fist at Zarwell’s head. Zarwell pulled the struggling slammed him back against the Zarwell did not answer. His memory seemed on the point of “I don’t see why not.” Zarwell Zarwell corrected him. “You’d be foolish!” Bergstrom obviously realized how close he was to death. Yet he showed little fear. Zarwell had thought the man a bit soft, too adjusted to a life of ease and some prestige to meet danger calmly. Curiosity restrained his trigger finger. “Why would I be foolish?” he maintained a professional diversionary chatter as he administered The floor beneath Zarwell’s feet “Is that the best you can do?” “No.” Bergstrom was angry now. “But use that logical mind you’re supposed to have! Scenes before this have shown what kind of man patient. If he was skilled enough, he could sort the relevancies from Zarwell debated with himself the asked. and Zarwell sank deep into “Because you’re no mad-dog killer!” Now that the crisis seemed ZARWELL found himself Zarwell’s eyebrows raised. He should know all about the instrument, its purpose and workings, but he could not bring his thoughts into rational focus. His forehead creased with his mental aside with one hand. “Your name makes little difference. You’ve used many. But you are an idealist. Your effort. merely shortening the space between them—the man who held Abruptly the unreality about him shifted perspective. He was mutual attraction. The man with the gun raised his Zarwell made his decision quickly. weapon and pressed the trigger. ALL Zarwell’s attention seemed reflected. It was more than least every twenty hours. Fortunately his natural features would serve as an adequate disguise now. himself well in an emergency. Bergstrom shrugged, dismissing concealed by his present perplexity. He was a man who could handle reticence, however. The man had his strayed thoughts. “I expected sitting is about all we ever try. Otherwise some particular episode might cause undue mental stress, and set up a block.” He glanced down at his appointment pad. “Tomorrow Zarwell grunted acknowledgment same bearded men who had been Zarwell left the analyst’s office. was careful not to rest his hand on the flesh searing surface of the stone. Zarwell passed a group of “Trust and money,” Zarwell said Zarwell nodded. his ennui. [p 139 Zarwell stopped him with an upraised you see the reason for all this? I’m tired. I’m trying to quit.” follow him. Zarwell explained listlessly. “A his mind lost its sleep-induced [p were rotten. We went with him. Again we were successful. It seems I have a kind of genius for that saying: ‘When the oppressed win their freedom they are as oppressive Zarwell’s tone appealed only as it would have been if he had studied it from blueprints, not to Bergstrom for understanding. “I have only a normal man’s indignation as though he lived there. I can’t get rid of it.” He rose. “That disguise and streets. Zarwell moved among memory planting were supposed to get me out of it. I should have conflict . The background changed. He understood that he was on a different world. RESTLESSNESS drove Zarwell Here a city burned. Its resistance was nearing its end. Zarwell was wall surrounding the stricken metropolis. He moved in and joined a party of short, bearded men, directing them as they battered at the Zarwell turned and studied the Zarwell was not the leader of the invaders, only a lesser figure in the rebellion. But he had played a leading part in the planning of the strategy that led to the city’s fall. ] beyond the age of sports. He had a manner of contained energy. was fleeing, pursued by the Zarwell tried to feel the anger he his comrades before. Still he moved with the same firm purpose, vigilant, resourceful, and well prepared for the eventuality that had befallen. He made his escape without I’ll leave—if you tell me to.” Against his will he found himself liking the man, and wanting at least to be courteous. He inclined his conflict engulfed him. Weary but resigned he accepted difficulty. “Then will you just listen? After, He alighted from a space ship on Zarwell smiled with mild embarrassment. Zarwell found himself not listening Zarwell’s expression became did they always try to drag him into their troubles? Why hadn’t he chosen some other world on which to hide? The last question prompted a new thought. Just why had he chosen St. Martin’s? Was it only a coincidence? Or had he, subconsciously at least, picked this particular world? He had always considered himself the unwilling subject of glib persuaders … but mightn’t some inner compulsion of his own have put the monkey on his back? “… and we need your help.” “It is my considered opinion,” Zarwell gazed up at the bright Bergstrom went on, “that your lost memory will turn out to be no ordinary “That’s why you’re here, you A WORK truck picked Zarwell bringing ocean muck from the converter plant at the seashore his to supplement the ocean sediment. The progress of life from the sea to the land was a mechanical [p life. The necessary machinery and technicians had been supplied by Earth, and the long struggle began to fit the world for human needs. When Zarwell arrived, six of the energy and resources of the world were devoted to that essential expansion. sodded the sterile rock, planted binding grasses, grain and trees, and diverted rivers to keep it fertile. When there were no rivers to divert they blasted out springs and lakes germ and insect life from what they found in the sea. Where that failed, they imported microorganisms from Earth. Three rubber-tracked crawlers export thus far. Zarwell pulled his sun helmet lower, to better guard his hot, dry After its three-thousand-mile journey across scorched sterile rock, it sucked the moisture from a man’s Zarwell gazed idly about at the cure for the skin fungus had not yet been found the men’s faces and hands were scabbed and red.

<question>:
What motivates Zarwell to take on the 'missions' he leads?

<options>:
A He desires to eradicate the galaxy of authoritarian regimes
B He is not consciously aware of why he agrees to participate in the missions
C He enjoys the adrenaline rush of the precarious situations his missions place him in
D He wishes to prevent Earth from being destroyed by man-made climate change

<answer>:

B