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

<passage>:
blue robe in George Kinton's opinion clashed with the dull and clucked, "when none would think to watch him, they tell me ... and quite rightly, I think—" left the chamber in which he lay. clicking two claws together, a sign of emphatic disagreement. "Albirken," he said, "was soon followed by three police constables "Why did he say he was traveling that way?" asked Kinton, thinking to himself of the spaceship! Was the man crazy? "He did not say," answered Klaft expressionlessly. "Taking them by surprise, he killed two the third before fleeing with one Kinton looked from him to the messenger, noticing for the first time that the latter was an under-officer head distractedly. It appeared that his suspicions concerning Birken had been only too accurate. Why was it one like him who got through? he asked himself still left Kinton with a feeling of misproportion. He should be used to it after He did not worry about his ten years, he thought, but even now— own position. That was well enough established, whether or Even if they had been aroused to a rage by the killing, Kinton told himself, he would not have been concerned about himself. He wondered yet again why any Kinton remained conscious of the he believed, no Terran could teach their experts anything. "Then will you tell us, George, He broke off at the word question. Before Kinton had formed his "I regret I shall have to conclude Birken replied at last. wondering at the fact that they were not shaking. He felt dejected, of. To protect him, he wondered. Or to get Birken? about Birken. they had been warned and fled." "Couldn't they have seized him?" demanded Kinton, his tone sharp with the worry he endeavored Still ... he sensed the disappointment away, he shook his head at clicked his showy teeth uncomfortably. "But George! It was enough that they were present when you might be offended, George," he answered at last. "Perhaps they thought you Klaft's respectful protest. Kinton settled back in the seat received the news. They can talk behind the pilot. In other words, he thought, he was responsible for Birken, who was a Terran, one of his own he had wasted in talk while the want to risk hurting his feelings, but that was only part of it. They were leaving it up to him to handle what they considered his private affair. He wondered what to do. He had no actual faith in the idea that Birken was delirious, or acting under any influence but that of a criminally self-centered nature. thought. Maybe he shouldn't Maybe he was wrong, he shouldn't have told him To help himself forget the about the ship!" Kinton muttered, body. his left thumb. "He's on the run, all right. Probably scared the colonial authorities will trail him corrected. "But what then? We would have built you another He caught himself and looked around to see if he had been overheard. workers assigned to the institute Kinton, disturbed, tried to remember whether he had organized about the person Would Birken listen if he tried for whatever help he had been, reasoning, he asked himself. they had proved the unpredictability of Kinton. he reflected. They hadn't needed seizing the weapon had him panting. serious. a certain lack of drive resulted By the time his passengers had alighted, however, Birken had drawn level with them, about "Birken!" shouted Kinton. "Where do you think you're going?" Seeing that no one ran after [112] supposed to watch over a single "Sorry, Kinton," he shouted with no noticeable tone of regret. individual on the surface. Like He watched them over his shoulder. "It's not so damn healthy up there!" called Kinton. "I told them jokingly that he felt no and Kinton often told and Kinton remembered exploded." Birken showed no more change of expression than if the other had commented on the weather. his anxiety at the way Birken persisted in drifting before him. killed [106] by the disgruntled scientists A twinge of shame tugged down the corners of his mouth as he realized that keeping Birken here would also expose a highly cultured people to an unscrupulous loved speculating about the committed murder the very first time he had been crossed. "Birken!" he shouted. "For succeeded in quieting the lesser unsolvable. They had even founded clubs to argue whether two Birken stopped at that. He regarded he had deduced after hearing it one occupant of the wreck, alive or dead, had been discovered—had accordingly By the time Kinton's aging muscles obeyed his impulse to sidestep, the spear had already hurtled past. It had missed him by an error of over six feet. [113] He felt his face flushing with sudden anger. Birken was running unexpected pang of disappointment. curled a lip wrily at the sudden, Well, he hadn't realized others with him stood attentively until then what he was really sleep, his mouth was thin and hard. "Thrown across the controls after his belt broke loose?" Kinton guessed. George," said the plump Tepoktan Or was it the fright at having a spear thrown at him? He decided that Birken had not come close enough for that, and wondered if he was afraid of his Kinton could not remember in charge. It wasn't fair, he complained own impending action. him, but everyone on the planet to himself. The poor slob only and die. Whose wishes would steadied on Birken as the latter he admitted complacently. Kinton, without exactly seeing each, was aware of the He broke off at the sound from of Birken. One struck the ground beside the man just as he set one foot Why, he looked scared when he saw me , thought Kinton. Birken's head. The spaceman was blown back from the ladder. He balanced on his lips after ten years. He tried again. "My name is George Kinton. I don't blame you if I'm hard to understand. You see, I've been for a few breaths, then seemed to relax. "Al Birken," he introduced himself laconically. "Ten years?" "A little over," confirmed Kinton. "He is dead," said Klaft when over Birken. "It's extremely unusual that anything gets through to the Birken's stare was suspicious. "Then you ain't heard about the intervening ground to bend the new colonies? Naw—you "George...?" "Well?" "It would be very instructive—that surprised at the harshness of his rule—prisons, for instance. He resolved to be wary of the visitor. "Ya might say I was explorin'," had just been at a high pitch of excitement. "Why did you not let him go, George?" "What? Why ... why ... he would have destroyed the ship Kinton realized guiltily that the man should be resting. He [108] I didn't make it. Say, how bad "That's why I come alone. Didn't want nobody else hurt if ship, George, for it was you who and relayed the information that Birken's leg was broken but had lost track of the moments that the other injuries were not know the murder he did here we can only guess what he did He questioned the doctor briefly Should he have a chance to go back and commit more crimes?" "I understand, George, the logic of it," said Klaft. "I meant ... it is not my place to say this felt that he should not neglect for all they did for him. Birken's leg, inserting a metal Birken seemed eager to learn all Kinton could tell him About himself, he was remarkably reticent. Kinton worried about this. the axe, as we say," interrupted plain on Kinton's face. "In other words, criminals. You suspect this Albirken is such a one, George?" "It is not impossible," admitted Kinton unhappily. "He will tell me little about himself. It may be that he was caught in To himself, he wished he had not told Birken about the spaceship. He didn't think the man exactly believed his explanation of why there was no use taking

<question>:
Why was George regretful for killing Al Birken?

<options>:
A George had damaged the ship that the Tepoktans built
B George wanted another human to live on Tepokt with
C George wanted to give Al Birken a fair trial
D George thought Al Birkin was innocent

<answer>:

B