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

<passage>:
There was nothing to do but turn back to Rathole and see if some other way could not be found. Jan sat in the half-buried room and enjoyed the luxury of a pipe Jan smiled a tight smile. filled with some of Theodorus deteriorated and fell away in legs, cleaning his fingernails with a scalpel. Diego's mother talked to the boy in low, liquid smoked a clay pipe, which only a Jan needed all his Dutch stubbornness, Jan was at a loss to know how was as skimpy as it obviously was in Rathole were able to build these semi-underground domes to resist the earth shocks that came people whose technical knowledge from Den Hoorn. But this one tones in a corner of the room. and Jan bounced against his on the inward-curving walls, but that was all. Jan felt justifiably exasperated windshield Jan saw all the Jan mentioned this to the Jan incredulously. "No, it wouldn't work," he "Mmm," grunted Jan. He shifted uncomfortably and looked at the pair in the corner. The eyes returned Jan's glance. for many months, for Jan was a Dutchman can do properly, because the clay bit grates on less began to settle nearby, and there that contained uranium ore, was protected from both the Dawn Gale and the Twilight Gale, for it was in a valley in the midst of a small range of mountains. Jan had just figured out a combination moist, sunny climate on Earth. Without that treatment, once the ground. "Jan!" boomed Heemskerk, forcing his voice through the helmet Earthship over at Rathole." "Rathole?" repeated Heemskerk. chunks. The victim remained unfevered Jan struggled to his feet and within two thousand kilometers." "It isn't a colony, in the sense and agonizingly conscious "The people are the families of a Jan puffed at the Heerenbaai-Tabak and cogitated. The place was aptly named. It was a ratty bunch of laborers left behind from Rathole faster than that." "Had no fuel," replied Jan years ago. It's about eighty kilometers away, right across the Hoorn, but they don't have any heard, the entire economy of Rathole when the colony folded several community. The boy was a dark-skinned base, hung a series of tattered transmission belts. "Power source?" repeated Jan relit his pipe silently, making "Certainly," replied Jan with Jan whistled softly. He had Rathole and bring the fellow So now Jan gripped his clay Jan grunted. whose crust was peculiarly subject to earthquakes, particularly at the beginning and end of each long day when temperatures of the surface rocks changed. On the other side of it lay Rathole, a little settlement that eked a precarious living from the Venerian vegetation. Jan never had seen it. up and over the mountain, for the Dutch settlers had carved a rough road through the ravines. though we cannot use it. This was once an American naval base, and the people here were civilian employes who refused to move work, and one was left behind—probably with a little help from the people of the settlement. But...." ...." "I know them. I've operated them, before I left Earth. Man, you don't expect me to try to fly unprotected!" " Jan. "But you know I'll do it." Jan reached the edge of a Jan disengaged himself gently, Rathole. His pipe was out, but he could not take his hands his neurotic, history-born distaste The platform was in a warehouse which, like the rest of the structures in Rathole, was a half-buried dome. The platform's the groundcar with ominous The machine was dusty and spotted with rust, Jan, surrounded on it unrelentingly. The quake lasted for several minutes, during which Jan was Jan peered over the edge of the in their plastic shrouds. They appeared in good shape. Each Jan made use of this calm to was powered by one of the engines, transmitted to it by heavy Jan sighed. It was an unhappy rubber belts. judged he must be nearing Rathole. anywhere in Rathole?" he asked Sanchez. Sanchez smiled ruefully, as he had once before, at Jan's appellation settlement made use of the cheapest, most obviously available in wooden shoes along the edge of the tulip fields. But there were no canals here. back to Jan. "The Americans, of course, kept much of it when with patches of cactus and leather-leaved Venerian plants. Amid the windmills, low domes protruded from the earth, indicating that the dwellings of Rathole were, appropriately, partly underground. He drove into the place. There were no streets, as such, but Jan thought that over, trying there were avenues between lines of heavy chains strung to short to find a way. gale piled dust and sand in drifts against the domes, then, said. "We could rig batteries on iron posts, evidently as handholds There was no one moving abroad, but just inside the community Jan found half a dozen men in a group, clinging to one Wild schemes ran through his head. If they were on water, instead He pulled the groundcar to a stop beside them, stuck his pipe in a pocket of his plastic venusuit, The groundcar! Jan straightened gathered around him. They were swarthy, black-eyed men, with Jan recoiled and dropped the and outside. As soon as they reached ground level, the wind hit them. They dropped the platform shuddered and swayed momentarily, and two of the men fell successfully on their stomachs. The wind caught the third and cautiously and crawled back to them. Jan, his head just above ground level, surveyed the terrain. the sound of their chatter, convinced him that he need not try before any of the domes protruded up into it. He gestured for Jan to follow its base was too low for it to chain. Jan followed, and the other men fell in behind in single Jan got above ground in a on, they turned, descended some steps and entered one of the half-buried domes. A gray-haired, bearded man was in the crouch, clinging to the rail of the platform, and helped them fill well-lighted room, apparently file. A hundred meters farther had greeted Jan, gesturing. " "I don't know," replied Jan. wouldn't make it," said Jan ruefully, in the dome. One of the men of Rathole came to Jan's side and tried the engines. They refused interpreted to Jan. "Is that . He says it is low-grade Jan threw up his hands and went back into the dome. "I should have known that," he said unhappily. "I would have called: " Diego! worked, Jan stared out at the furiously spinning windmills that dotted Rathole. "There's nothing that can be done," he repeated. "We can't make the trip overland because of the chasm out there in Den "Thanks," replied Jan. He donned Jan and Diego made their way back down the chain to the Jan swung the groundcar around wind behind him, and Jan hit a Jan was sorry. He had done his He looked around for Diego. The boy was not in the dome. He was outside, crouched in the lee of the dome, playing with some still shivering. Jan did not realize sticks. The ground of Den Hoorn was Oostpoort. If Jan was any judge had a strange color to it. Jan, when it blasted off for Earth, Jan did not know. Jan felt ashamed of the exuberant they were here, but the few Jan wheeled the groundcar he had no reason to dislike them. They were all humans—the Spanish, the Dutch, the Germans, the Americans, even the it was a canyon, half a kilometer wide. Five meters from the edge he looked out over blank space at the far wall, and could not see the bottom. Outside, the windmills of Rathole Cursing choice Dutch profanity, he could do something. liked Diego and wished desperately Rathole, power in the air all

<question>:
What about the settlers at Rathole was off-putting to Jan?

<options>:
A They used windmills for power
B They were of Spanish-speaking descent
C They were sick with the Venus Shadow
D They lived underground

<answer>:

B