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

<passage>:
Snaddra had but one choice in its fight "A beggar does not associate with the high priestess of Snaddra." "But the Earthmen aren't due for another fifteen minutes," Skkiru "This is, in effect, good-by," she continued. "We shall see each other adopting. A necessary way of life, if we of Snaddra are to keep on She had been seeing too many of the Terrestrial fictapes from the were not considered backward enough for the kind of planet Snaddra "Just because you went to school in another solar system," Skkiru said, this planet. However, even under the old system, I was always glad to I hate Terrestrials I hate Terra. fiance—her erstwhile fiance, that was, for the new regime had caused planet, had received her education at the local university. Although idea of who was to become my high priestess. The lots chose Larhgan. It Snaddra were very severe. So he had to fall back on a weak, "And I ground during the day, like—like savages." whole thing really was. There must be another solution to the planet's "Earth ship in view!" a squeaky voice called through the intercom. own appearance—which was, although picturesque enough to delight romantic Terrestrial hearts, sufficiently wretched to charm the most the Terrans' own to be of interest to them," he said, with affected other—and we have to be different to attract Earthmen. They're pretty hungry, and remember this isn't for you or for me, but for Snaddra." "For Snaddra," Larhgan said, placing her hand over her anterior heart to indicate—was obscene on Snaddra, owing to the fact that certain essential organs were located in different areas in the Snaddrath than in the corresponding Terrestrial life-form. Already the Terrestrial "Alms, for the love of Ipsnadd," Skkiru chanted, as the two Terrans procession of young Snaddrath dressed in elaborate ceremonial costumes, smattering of Snadd somewhere. Since neither party was accustomed to "Alms, for the love of Ipsnadd," chanted Skkiru the beggar. custom-weatherbeaten for him by the planet's best tailor—now a pariah, of course, because Snadd tailors were, naturally, metal-workers—and planet, except to pass over, and he had actually touched it only when taking off and landing. The Snaddrath had no means of land transport, The outside was no place for a civilized human being, particularly in the wet season or—more properly speaking on Snaddra—the wetter Earth ship long before the official greeters had reached it. The newcomers were indeed humanoid, he saw. Only the peculiarly pasty color of their skins and their embarrassing lack of antennae distinguished them visibly from the Snaddrath. They were dressed much as the Snaddrath had been before they had adopted primitive garb. In fact, the Terrestrials were quite decent-looking life-forms, expected to represent the cultural ruling race. Of course, he had could be retouched. Why, it was the Terrestrials themselves, he had "Look, Raoul," the older of the two Earthmen said in Terran—which the Snaddrath were not, according to the master plan, supposed to third language on most of the outer planets. "A beggar. Haven't seen amass enough material for a really definitive work. The natives tried "Oh, they were cannibals?" the other Earthman asked, so respectfully "No, not at all," the other assured him. "They weren't human—another species entirely—so you could hardly call it cannibalism. In fact, it just then. Decided that, in this case, it would be best to let the missionaries get first crack at them. Soften them up, you know." "And the missionaries—did they soften them up, Cyril?" "They softened up the missionaries, I believe." Cyril laughed. "Ah, well, it's all in the day's work." since this is my first field trip and I would like to make good at it." had always seemed highly improbable, anyway. How could any intelligent "The natives certainly appear to be human enough," Raoul added, with an appreciative glance at the females, who had been selected for the processional honor with a view to reported Terrestrial tastes. "Some constructed and less interested in females than Raoul. with the native females. It tends to detract from true objectivity." On Earth, he had heard, where people lived exposed to weather, they of birth control on so vulgarly fecund a planet. Snaddra, alas, needed to descend to a subterfuge like this for nothing more than survival. For one thing, it was quite in character for him to tread curiously thought, that was, but well in keeping with his beggarhood. Beggars were often poets, he believed, and poets almost always beggars. Since metal-working was the chief industry of Snaddra, this had provided the planet automatically with a large lowest caste. Bbulas had taken the planet, it was not politic for the Earthmen to discover how heavily the Snaddrath depended upon imports. As the Earthmen reached the temple, Larhgan now appeared to join Bbulas there, clad in beauty, dignity and warm clothes, she bade the newcomers lovely and so remote. "... and so you are most welcome to Snaddra, men of Earth," she was with love. We hope that you will enjoy as long and as happy a stay here contemplating Larhgan's apparently universal charms to pay much "... and that you will carry our affection back to all the peoples of the Galaxy." were honored by your gracious invitation to visit this fair planet, and apparently deciding that applause was all that had been intended. analysis of your culture as painless as possible. We wish only to study "But why is it," Raoul whispered in Terran as he glanced around out of established rapport. Don't be so impatient!" but unusually interesting ceremony will be held outside the temple. We but the planet seems to be a veritable sea of mud. Not, of course," he Terrestrials. That is why we are holding this ceremony. It is not a the improvement of Snaddra, surely he could have done better than Only the Earthmen, for the Snaddrath, no matter how much they threw for his planet in many ways—but wantonly starving to death as the to the native hut prepared for them, how ignominious it would be for one of the brightest young architects on the planet to have to subsist the Earthmen from discovering the existence of those other cities. He could, of course, emigrate to another part of the planet, to one of It wasn't that Skkiru didn't understand well enough that Snaddra had minerals—they had never been very extensive to begin with. All life-forms on the planet were on the point of extinction, save fish and rice—the only vegetable that would grow on Snaddra, and originally a Terran import at that. So food and fiber had to be brought from the other planets, at fabulous expense, for Snaddra was not on any of the direct trade routes and was too unattractive to lure the tourist The traditional office of Planetary Dilettante was a civil-service job, awarded by competitive examination whenever it fell vacant to The winner was sent to Gambrell, the nearest planet with a Terran individual on Snaddra could afford such schooling, no matter how why only one person in each generation could be chosen to go abroad at the planet's expense and acquire enough finish to cover the rest of the fact that Snaddra was falling into ruin, was an emergency. So he had, of saving Snaddra—and Bbulas, happy to be in the limelight at last, felt, that any reasonable person would have chosen. Nevertheless, the Bbulas Plan had been adopted by a majority vote of the Snaddrath, anthropological viewings—though Bbulas might have been the only one privileged to go on ethnological field trips to other planets, he was life? There was no reason why, within the framework of the primitive society Bbulas had created to allure Terran anthropologists, Skkiru primitive tradition of romance.

<question>:
Why are the people of Earth interested in visiting Snaddra?

<options>:
A Understanding how to live in so much rain
B Social studies of the creatures
C Their architectural advances
D Missionary deployments

<answer>:

B