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

<passage>:
A Gift From Earth Earthmen land among the Thorabians!" 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 nor true Earthmen, but a mixture of both." and our fortune. It is the muscle and bone of our trade. Earthmen may Zotul's eyes widened. "And that is why my brothers did not beat me when By this, he seemed to imply that the Thorabians would rob the Earthmen, to get their hands on that marvelous ship, which was all of metal, a "Doubtless," said Zotul unexpectedly, for the youngest at a conference was expected to keep his mouth shut and applaud the decisions of his elders, "the Earthmen used all the metal on their planet in building that ship. We cannot possibly bilk them of it head than in all the rest of you. Forget the Earthmen and think only of the clay." about the Earthmen. If it was impossible to hope for much in the way of metal from the Earthmen, what could one get from them? If he could By and by, the Earthmen came to Lor, flying through the air in strange The Earthmen were going to do great things for the whole world of Zur. It required but the cooperation—an excellent word, that—of all Zurians, and many blessings would rain down from the skies. This, in the Earthmen and officials of the Lorian government, but you heard one tried. The anti-Earthmen Faction—in any culture complex, there is arrived and after they had landed all over the planet, Zur was Immediately, the Earthmen established what they called In spite of the fact that a terrestrial ship had landed at every Zurian pottery one evening, he found his wife Lania proudly brandishing an aluminum pot at him. "What is that thing?" he asked curiously. "A pot. I bought it at the market." "Did you now? Well, take it back. Am I made of money that you spend my substance for some fool's product of precious metal? Take it back, I say!" The pretty young wife laughed at him. "Up to your ears in clay, no wonder you hear nothing of news! The pot is very cheap. The Earthmen are selling them everywhere. They're much better than our old clay pots they're light and easy to handle and they don't break when dropped." "The Earthmen don't cook as we do," she explained patiently. "There is a paper with each pot that explains how it is used. And you will have to design a new ceramic stove for me to use the pots on." "Don't be idiotic! Do you suppose Koltan would agree to produce a new type of stove when the old has sold well for centuries? Besides, why do you need a whole new stove for one little pot?" "A dozen pots. They come in sets and are cheaper that way. And Koltan will have to produce the new stove because all the housewives are buying these pots and there will be a big demand for it. The Earthman said so." "He did, did he? These pots are only a fad. You will soon enough go back to cooking with your old ones." "The Earthman took them in trade—one reason why the new ones are so cheap. There isn't a pot in the house but these metal ones, and you 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 stamped off in a rage and designed a new ceramic stove, one that would accommodate the terrestrial pots very well. And Koltan put the model into production. do well by us." The kilns of the Pottery of Masur fired day and night to keep up with the demand for the new porcelain stoves. In three years, more than a million had been made and sold by the Masurs alone, not counting the hundreds of thousands of copies turned out by competitors in every land. In the meantime, however, more things than pots came from Earth. One was a printing press, the like of which none on Zur had ever dreamed. This, for some unknown reason and much to the disgust of Moreover, the Earthmen brought miles of copper wire—more than enough Within five years of the first landing of the Earthmen, every major "this coming of the Earthmen had been a great thing for us, and unthinkable impertinence. It would do no good, Zotul realized, to bring up the fact that their production of ceramic cooking pots had dropped off to about two per cent of its former volume. Of course, profits on the line of new stoves greatly overbalanced the loss, so that actually they were ahead but their business was now dependent upon the supply of the metal pots from Earth. About this time, plastic utensils—dishes, cups, knives, forks—made their appearance on Zur. It became very stylish to eat with the everything they sold, the Earthmen always took the old ware in trade. What they did with the stuff had been hard to believe at first. They "Note," Koltan announced in a shaky voice, "that the Earthmen undermine subsided. "They are replacing our high-quality ceramic ware with inferior terrestrial junk," Koltan went on bitterly. "It is only the glamor that sells it, of course, but before the people get the shine out of their of Earth. Think of the telegraph and The merchandise of the Earthmen is put up for sale by means of these in the underlayers of the planet's crust. Crews of Zurians, working terrestrial ship, the Earthmen were conducting a brisk business in was gone. Moreover, the Earthmen sold the Zurians their own natural gas "Some new devilment of the Earthmen, you can be sure," said Koltan radio parts. This was Earth's first step toward flooding Zur with the to Zur!" hitherto unheard-of vehicles. The last hope of the brothers was dashed. The Earthmen set up plants "What is that?" asked Koltan. Zotul. It took three weeks for the Earthmen to get around to calling with something called "blacktop" and jammed with an array of glittering new automobiles. they were the envied ones of Zur. the baggy costume of Zur, he looked almost like a Zurian, except for the world of Zur. That was before my father, the famous Kalrab all because of new things coming from Earth." bargain-priced merchandise of Earth must be poor indeed. "None at all," beamed the Earthman cheerily. "Every item is given to He chuckled deeply. "We of Earth have a saying about one of our "Impossible," said Zotul drably. "Not I and all my brothers together "What is that?" asked Zotul skeptically. Zotul grasped at the glittering promise with avidity. "What must I do Zotul, anxious to possess the treasures promised by the Earthman, interest in the Pottery of Masur. They rolled in the luxuries of Earth. the crust of Zur and was sold to the Zurians at a magnificent profit. The food they ate was cooked in Earthly pots on Earth-type gas ranges, served up on metal plates that had been stamped out on Earth. In the winter, they toasted their shins before handsome gas grates, though they had gas-fired central heating. electrical gadgets and appliances hit the market. For some reason, Earthmen, explained Broderick, had built a plant of their own because maintain. But all Zurians who had to keep up with the latest from Earth had them. Now it was possible not only to hear about things of Earth, The pottery income dropped to an impossible low, no matter how Zotul designed and the brothers produced. Their figurines and religious ikons were a drug on the market. The Earthmen made them of plastic and sold them for less. pottery to us." The brothers, when they heard of this, were too stunned to think of terrestrials were picked for physical assets that made Zurian men covetous and Zurian women envious. "I don't understand. The Earthmen...." Zotul paused, coloring. "We are "You mean," exclaimed Zotul, aghast, "that you Earthmen own everything on Zur?"

<question>:
What wasn't something unheard of that the Earthmen brought to Zur?

<options>:
A the idea of credit
B new roads
C government
D metal pots

<answer>:

C