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

<passage>:
on Earth." "But it's mobbed," protested Zotul. "It gave me a headache." Zotul, youngest of the Masur brothers, stirred uneasily. Personally, he was in favor of the coming of the Earthmen to the world of Zur. with yours. The future population of Zur will be neither true Zurians dotage, but still giving what he could of aid and comfort to the Zotul sat in silent thought. "But you did not have to buy us out. You had the power to conquer us, even to destroy us. The whole planet could have been yours alone." He stopped in alarm. "Or am I suggesting an nor true Earthmen, but a mixture of both." and last in the rank of age, Zotul, who was responsible for affairs of design. "At last I understand what you said about the tortoise." "Slow but sure." Broderick beamed again and clapped Zotul on the shoulder. "Don't worry. You'll have your job back, the same as always, are equal in knowledge and therefore equal partners. That's why we had to break down your caste system." Zotul's eyes widened. "And that is why my brothers did not beat me when I failed!" "Of course. Are you ready now to take the assignment papers for you and your brothers to sign?" "Yes," said Zotul. "I am ready." for him. He would report when the time was ripe. "Doubtless," said Zotul unexpectedly, for the youngest at a conference was expected to keep his mouth shut and applaud the decisions of his "When your opinion is wanted, we will ask you for it. Meantime, remember your position in the family." Zotul bowed his head meekly, but he burned with resentment. "Listen to the boy," said the aged father. "There is more wisdom in his head than in all the rest of you. Forget the Earthmen and think only of the clay." Zotul did not appreciate his father's approval, for it only earned him a beating as soon as the old man went to bed. It was a common enough thing among the brothers Masur, as among everybody, to be frustrated in their desires. However, they had Zotul to take it out upon, and they did. Still smarting, Zotul went back to his designing quarters and thought Zur. It required but the cooperation—an excellent word, that—of all Zurians, and many blessings would rain down from the skies. This, in effect, was what the Earthmen had to say. Zotul felt greatly cheered, for it refuted the attitude of his brothers without earning him a thing one day and another the next. Accurate reporting, much less a city of major and minor importance, and all in a single day, it took some time for the news to spread. The first awareness Zotul had was that, upon coming home from the pottery one evening, he found his wife Lania proudly brandishing an aluminum pot at him. will have to design and produce a new stove if you expect me to use them." After he had beaten his wife thoroughly for her foolishness, Zotul dreamed. This, for some unknown reason and much to the disgust of scanty reading ability and bought everything available, overcome by the novelty of it. Even Zotul bought a book—a primer in the Lorian Within five years of the first landing of the Earthmen, every major especially for the House of Masur." "You didn't think so at first," Zotul pointed out, and was immediately unthinkable impertinence. It would do no good, Zotul realized, to bring up the fact that their "Perhaps," said Zotul, "it is a good thing also, as you said before, and will result in something even better for us." Koltan frowned, and Zotul, in fear of another beating, instantly subsided. "They are replacing our high-quality ceramic ware with inferior nowhere with their wrangle, he cleared his throat and spoke up. things had happened. For one, old Kalrab had passed on to his immortal at a nice profit and everybody was happy with the situation except the Zotul. It took three weeks for the Earthmen to get around to calling him in, as a representative of the Pottery of Masur, for an interview. All the brothers could no longer be spared from the plant, even for the purpose of pressing a complaint. Their days of idle wealth over, they had to get in and work with the clay with the rest of the help. Zotul found the headquarters of the Merchandising Council as indicated on their message. He had not been this way in some time, but was not surprised to find that a number of old buildings had been torn down to jovially with Zotul. That alien custom conformed with, Zotul took a better look at his host. Broderick was an affable, smiling individual with genial laugh wrinkles at his eyes. A man of middle age, dressed in Zotul on the back. "Just tell us your troubles and we'll have you straightened out in no time." All the chill recriminations and arguments Zotul had stored for this Almost apologetically, Zotul told of the encroachment that had been made upon the business of the Pottery of Masur. "Once," he said formally, "the Masur fortune was the greatest in Zotul had to answer no to all except the radio. "My wife Lania likes the music," he explained. "I cannot afford the other things." bargain-priced merchandise of Earth must be poor indeed. "To begin with," he said, "I am going to make you a gift of all these luxuries you do not have." As Zotul made to protest, he cut him off "None at all," beamed the Earthman cheerily. "Every item is given to but sure.' And so with us. Our goal is a long-range one, with the motto, 'Better times with better merchandise.'" The engaging manner of the man won Zotul's confidence. After all, it was no more than fair to pay transportation. "Impossible," said Zotul drably. "Not I and all my brothers together have so much money any more." Zotul grasped at the glittering promise with avidity. "What must I do to get credit?" Zotul drew back. "I have five brothers. If I took all these things for myself and nothing for them, they would beat me black and blue." of your brothers sign one of these, then bring them back to me. That is all there is to it." It sounded wonderful. But how would the brothers take it? Zotul wrestled with his misgivings and the misgivings won. "I will talk it over with them," he said. "Give me the total so I will have the figures." The total was more than it ought to be by simple addition. Zotul a quarter interest in your plant itself, assigned to our terrestrial company." Zotul, anxious to possess the treasures promised by the Earthman, won over his brothers. They signed with marks and gave up a quarter interest in the Pottery of Masur. They rolled in the luxuries of Earth. The retooled plant forged ahead and profits began to look up, but the Broderick was very sympathetic, but there was nothing he could do. For the common people of Zur, times were good everywhere. In a decade The brothers Masur got along in spite of dropped options. They had less Would he like to see Mr. Siwicki instead? Zotul would. Siwicki was tall, thin, dark and somber-looking. There was even a hint of toughness about the set of his jaw and the hardness of his glance. "I don't know what you mean," said Zotul. "If we have to sue, we take back the merchandise and everything The brothers, when they heard of this, were too stunned to think of beating Zotul, by which he assumed he had progressed a little and was somewhat comforted. "To fail," said Koltan soberly, "is not a Masur attribute. Go to the was remarkable that he paid so little attention, for the female you." "Me?" marveled Zotul. them over, just as we are taking you over." "You mean," exclaimed Zotul, aghast, "that you Earthmen own everything on Zur?" "Even your armies."

<question>:
Who changed the least throughout the story?

<options>:
A Broderick
B Kalrab
C Koltan
D Zotul

<answer>:

A