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

<passage>:
Galaxy Science Fiction August 1955. Extensive research did not uncover any evidence that "And to us it's almost empty. The pressure of population on Earth has made us range the Galaxy for places to put our extra people. The only habitable planets, unfortunately, are populated ones. We take the least populous worlds and—well, buy them out and move in." "And after that?" was in favor of the coming of the Earthmen to the world of Zur. Earthmen land among the Thorabians!" with yours. The future population of Zur will be neither true Zurians nor true Earthmen, but a mixture of both." 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 Zotul sat in silent thought. "But you did not have to buy us out. You idea that didn't occur to you?" but you'll be working for us ... until the children of Earth and Zur are equal in knowledge and therefore equal partners. That's why we had and our fortune. It is the muscle and bone of our trade. Earthmen may 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 very scarce commodity on Zur, worth billions of ken. elders, "the Earthmen used all the metal on their planet in building did. Still smarting, Zotul went back to his designing quarters and thought 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 too quickly learned the tongue of the aliens hence these left much to be desired in the way of clarity, though their sincerity was evident. 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 thing one day and another the next. Accurate reporting, much less a newspaper, was unknown on Zur. Finally, the Earthmen took off in their great, shining ship. Obviously, tried. The anti-Earthmen Faction—in any culture complex, there is always an "anti" faction to protest any movement of endeavor—crowed happily that the Earthmen were gone for good, and a good thing, too. Such jubilation proved premature, however. One day, a fleet of ships arrived and after they had landed all over the planet, Zur was practically acrawl with Earthmen. Immediately, the Earthmen established what they called "corporations"—Zurian trading companies under terrestrial control. The object of the visit was trade. In spite of the fact that a terrestrial ship had landed at every Zurian city of major and minor importance, and all in a single day, it took "The Earthmen don't cook as we do," she explained patiently. "There is "The Earthman took them in trade—one reason why the new ones are so was wise of you to foresee it and have the design ready. Already, I am sorry for thinking as I did about the Earthmen. They really intend to 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 Moreover, the Earthmen brought miles of copper wire—more than enough in value to buy out the governorship of any country on Zur—and set up telegraph lines from country to country and continent to continent. Within five years of the first landing of the Earthmen, every major city on the globe had a printing press, a daily newspaper, and enjoyed the instantaneous transmission of news via telegraph. And the business "As I have always said from the beginning," chortled Director Koltan, "this coming of the Earthmen had been a great thing for us, and newfangled paraphernalia ... and very cheap, too, because for 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 all available space was occupied by the advertisements of the Earthmen. In their dozenth conference since that first and fateful one, the rest, but this made no real difference. For another, the Earthmen had procured legal authority to prospect the planet for metals, of which they found a good deal, but they told no one on Zur of this. What they did mention was the crude oil and natural gas they discovered in the underlayers of the planet's crust. Crews of Zurians, working regions to every major and minor city on Zur. By the time ten years had passed since the landing of the first terrestrial ship, the Earthmen were conducting a brisk business in gas-fired ranges, furnaces and heaters ... and the Masur stove business was gone. Moreover, the Earthmen sold the Zurians their own natural gas energetic protest to the governor of Lor. At one edge of the city, an area had been turned over to the Earthmen for a spaceport, and the great terrestrial spaceships came to it and departed from it at regular intervals. As the heirs of the House of much new building was taking place and wondered what it was. "Some new devilment of the Earthmen, you can be sure," said Koltan blackly. In fact, the Earthmen were building an assembly plant for radio loaded with printed circuits, resistors, variable condensers and other radio parts. This was Earth's first step toward flooding Zur with the natural follow-up in its campaign of advertising—radio programs—with to Zur!" bought receiving sets like mad. The automobiles arrived and highways were constructed. The last hope of the brothers was dashed. The Earthmen set up plants Zotul. It took three weeks for the Earthmen to get around to calling 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 Masur—Divinity protect him—departed this life to collect his greater all because of new things coming from Earth." Broderick stroked his shaven chin and looked sad. "Why didn't you come that you pay the freight charges on the items. Our purpose is not to make profit, but to spread technology and prosperity throughout the Galaxy. We have already done well on numerous worlds, but working out the full program takes time." "It may seem high," said the Earthman, "but remember that Earth is sixty-odd light-years away. After all, we are absorbing the cost of the the cost of operating an interstellar spaceship." "Impossible," said Zotul drably. "Not I and all my brothers together have so much money any more." Zotul, anxious to possess the treasures promised by the Earthman, 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. About this time, the ships from Earth brought steam-powered electric generators. Lines went up, power was generated, and a flood of electrical gadgets and appliances hit the market. For some reason, They had refrigerators, washers, driers, toasters, grills, electric fans, air-conditioning equipment and everything else Earth could But at the end of three years, the Earthmen dropped their option. The Pottery of Masur had no more contracts. Business languished. The Earthmen, explained Broderick, had built a plant of their own because it was so much more efficient—and to lower prices, which was Earth's unswerving policy, greater and greater efficiency was demanded. maintain. But all Zurians who had to keep up with the latest from Earth was remarkable that he paid so little attention, for the female terrestrials were picked for physical assets that made Zurian men covetous and Zurian women envious. the Earthman. "I don't understand. The Earthmen...." Zotul paused, coloring. "We are on Zur?"

<question>:
What was the real reason for the Earthmen to come to Zur?

<options>:
A they wanted to take over without war
B they wanted to share their technology with other worlds
C they wanted to find ways to make more money
D they wanted to discover intelligent life on other planets

<answer>:

A