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 to afford to live belowground—underhandedly pretend theirs was an aboveboard society! adopting. A necessary way of life, if we of Snaddra are to keep on by impartial lot, except for mine, and, of course, such jobs as could carry over from the civilized into the primitive." were not considered backward enough for the kind of planet Snaddra was now supposed to be, and attempted to wipe them dry on his robe. "I won't deny that I do have educational and cultural advantages which were, unfortunately, not available to the general populace of this planet. However, even under the old system, I was always glad to the chief outward signs of Terran-type training was self-control and Bbulas had been thoroughly terranized. I hate Terrestrials Snaddra were very severe. So he had to fall back on a weak, "And I with the high priestess's robes." Larhgan ignored his unfeeling observations. "I shall set myself apart from mundane affairs," she vowed, "and I shall pretend to be happy, pretty damn silly, Skkiru thought, at the same time conscious of his own appearance—which was, although picturesque enough to delight romantic Terrestrial hearts, sufficiently wretched to charm the most hardened sadist. it had never seemed to penetrate his mind that school-days were long since over. "I've told you a thousand times that our old culture was too much like the Terrans' own to be of interest to them," he said, with affected weariness. "After all, most civilized societies are basically similar it is only primitive societies that differ sharply, one from the other—and we have to be different to attract Earthmen. They're pretty choosy. You've got to give them what they want, and that's what they to indicate—was obscene on Snaddra, owing to the fact that certain essential organs were located in different areas in the Snaddrath than descended from the ship and plowed their way through the mud to meet a procession of young Snaddrath dressed in elaborate ceremonial costumes, taking off and landing. The Snaddrath had no means of land transport, self-levitation were on the prohibited list as being insufficiently primitive. The outside was no place for a civilized human being, particularly in the wet season or—more properly speaking on Snaddra—the wetter privileged ones were likewise trying to repress shivers. Though their costumes were rich, they were also scanty, particularly in the case of the females, for Earthmen had been reported by tape and tale to be humanoid. As the mud clutched his toes, Skkiru remembered an idea he had once gotten from an old sporting fictape of Terrestrial origin and had so well that, in spite of the procession's head start, he was at the 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, entirely different from the foppish monsters Skkiru had somehow expected to represent the cultural ruling race. Of course, he had frequently seen pictures of them, but everyone knew how easily those could be retouched. Why, it was the Terrestrials themselves, he had always understood, who had invented the art of retouching—thus proving beyond a doubt that they had something to hide. "Look, Raoul," the older of the two Earthmen said in Terran—which the Snaddrath were not, according to the master plan, supposed to understand, but which most of them did, for it was the fashionable third language on most of the outer planets. "A beggar. Haven't seen amass enough material for a really definitive work. The natives tried to eat us, so we had to leave in somewhat of a hurry." "Oh, they were cannibals?" the other Earthman asked, so respectfully that it was easy to deduce he was the subordinate of the two. "How "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 was quite all right from the ethical standpoint, but abstract moral creatures indeed ! Skkiru thought, with a mental sniff. Bbulas' asseverations that untruth was unknown to Terrestrials—which had always seemed highly improbable, anyway. How could any intelligent life-form possibly stick to the truth all the time? It wasn't human it wasn't even humanoid it wasn't even polite. "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 of birth control on so vulgarly fecund a planet. Snaddra, alas, needed momentary advantages over those who had been alloted higher ranks. For one thing, it was quite in character for him to tread curiously upon the strangers' heels all the way to the temple—a ramshackle metal, but they were solid. All the garments visible or potentially visible were of woven metal, because, although there was cloth on the planet, it was not politic for the Earthmen to discover how heavily the Snaddrath depended upon imports. there, clad in beauty, dignity and warm clothes, she bade the newcomers welcome in several thousand words not too well chosen for her by "... and so you are most welcome to Snaddra, men of Earth," she was analysis of your culture as painless as possible. We wish only to study your society, not to tamper with it in any way." Ha, ha as mud...." The smile did not leave Bbulas' smooth face. "Yes, of course, honorable 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 themselves into the spirit of their roles, could not be so carried away that they would give handouts to a young man whom they had been accustomed to see basking in the bosom of luxury. Unfortunately, the fees that he'd received in the past had not enabled result of a primitive affectation was hardly one of them. All the same, Skkiru reflected as he watched the visitors being led off 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 miserably on the dole just because the world had gone aboveground. The capital had risen to the surface and the other cities would soon follow suit. Meanwhile, a careful system of tabus had been designed to keep the Earthmen from discovering the existence of those other cities. He could, of course, emigrate to another part of the planet, to one of them, and stave off his doom for a while—but that would not be playing themselves with the aid of some antique blueprints that had been put out centuries before by a Terrestrial magazine and had been acquired rice—the only vegetable that would grow on Snaddra, and originally a other planets, at fabulous expense, for Snaddra was not on any of fact that Snaddra was falling into ruin, was an emergency. So he had, 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 should not make something of himself and show that a beggar was worthy

<question>:
What measures did the Snaddra creatures take for the arrival of the Earth visitors?

<options>:
A Creating great rain on the surface to appear as a primitive mud-based architectural beings, dressing in jeweled robes to show their opulence
B Destroying their underground cities, returning to the existing surface huts, acting from Earth’s culture so as to be accepted by them
C Hiding their spaceships, speaking in Earth’s language, constructing primitive accommodations
D Pretending to live on the surface, constructing primitive accommodations, acting as though they had no influences from Earth’s culture

<answer>:

D