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

<passage>:
found out." She took his arm as they gazed past the electrified fence at the Earth For Felicitas K. Wilson THE SIOUX SPACEMAN "Of course," he said, grinning at his stupidity. "And I guess we're not Don Cort, stranded on that rising town, was beginning to suspect that townspeople, a crackpot professor. that they know. Maybe we'll begin to get some answers. Or, if not answers, then transportation." "Transportation?" Alis squeezed the arm she was holding. "Why? Don't you days on the smallest—and the nuttiest—planet in the galaxy! "If you mean don't I like you, the answer is yes, of course I do. But if I like it here?" to Cort: either find a way to anchor Superior, or spend the rest of his clean clothes, you're not going to like me." she said, "before you deteriorate." They were in the midst of an extremely pleasant kiss when the brief case at the end of Don's handcuff began to talk to him. the witching hour. Somebody else said nonsense, they'd better check for radiation. A civil course to avoid it. He noted with only minimum satisfaction that his plaintively: " Cold up here!" Don had taken a passing interest earlier in the evening asked, "Why did been about to go on to her figure. Later, though, he was able to observe that it was more than adequate. But after a couple of weeks of floating around, it began to be obvious his mid-twenties—about her age—lean, tall and straight-shouldered, with once-blond hair now verging on dark brown, a face neither handsome nor ugly, and a habit of drawing the inside of his left cheek between his teeth and nibbling at it thoughtfully. But it was likely that all she noticed then was the brief case he Don hesitated, shrugged at the redhead, said, "Excuse me," and followed sat in the dark, hissing steam. Don made his way up to the locomotive and even an old red shirt. swelled with pride, it seemed, as he made a theatrical gesture. "Behold," he said. "Something even Columbus couldn't find. The edge of Standing on tiptoe and repressing a touch of giddiness, Don looked over Don looked at the fireman, who had an unbelieving expression on his Cavalier." Don Cort, sitting in the back seat of the car with the redhead from the world, hasn't it?" "Overnight," Geneva Jervis said. "If what Mr. Cort and the fireman say "What's that?" Don asked. and forty, counting you people from the train. I guess you'll be with us for a while." "What do you mean by that?" Jen Jervis asked. "Well, I don't see how you can get down. Do you?" "Maybe not a plane," Don said, "but a helicopter could land just about "Hm," said Hector Civek. Don couldn't quite catch his expression in the perhaps just a little less than completely honest with us?" "I work for the Government. Doesn't everybody?" "Not everybody. Me, for instance." "No?" she said. "Judging by that satchel you're handcuffed to, I'd have thought you were a courier for the Pentagon. Or maybe State." He laughed quickly and loudly because she was getting uncomfortably close. "Oh, no. Nothing so glamorous. I'm a messenger for the Riggs Don laughed again. "He sure is." late." to sleep," she corrected. She looked angry. "Of course," Don said, puzzled by her emphasis. "Come on. Where they put comfortable," she said. "What a night, eh? The professor is simply beside himself. We haven't had so much excitement since the cosmolineator blew up." Don Cort had slept, but not well. He had tried to fold the brief case to "Nut factory? You mean Cavalier?" Don struggled to manipulate knife and them scrambled tomorrow. Yes, Cavalier. Home of the crackpot theory and the latter-day alchemist." "I'm sure it's not that bad. Thanks. As for tomorrow, I hope to be out of here by then." whole patch of real estate for some fell purpose." "Scarcely fell , Mr. Cort. As for it being deliberate, that seems to be "I didn't know there were any." "Actually there's only one, the Superior Sentry , a weekly. This is an Don blinked at the headline: "Ed Clark's something of an eccentric, like everybody else in Superior," Don read the story, which seemed to him a capricious treatment of an the same exemption would apply to a dubious individual bent on investigating.... Don skimmed the rest. "I don't see anything about it being deliberate." bottom." Don creased the paper the other way, took a sip of coffee, nodded his The "reasons" include these: (1) Superior has been discriminated against by county, state and federal agencies (2) Cavalier Institute has been held up to global derision by orthodox (presumably meaning accredited) colleges and universities understand (b) lacks space to publish and which (it being atrociously handwritten) he (c) has not the temerity to ask his linotype operator to set. Don said, "I'm beginning to like this Ed Clark." "He's a doll," Alis said. "He's about the only one in town who stands up to Father." "Does your father claim that he Earth?" "Not to me he doesn't. I'm one of those banes of his existence, a skeptic. He gave up trying to magnolize me when I was sixteen. I had a science teacher in high school—not in Superior, incidentally—who gave me all kinds of embarrassing questions to ask Father. I asked them, being a natural-born needler, and Father has disowned me intellectually ever since." "How old are you, Miss Garet, if I may ask?" of such moist red softness that it seemed perpetually waiting to be kissed. All in all she could have been the queen of a campus much more densely populated with co-eds than Cavalier was. "You may call me Alis," she said. "And I'm nineteen." "Three months past. How old are you , Mr. Cort?" "Don's the name I've had for twenty-six years. Please use it." "Gladly. And now, Don, unless you want another cup of coffee, I'll go with you to the end of the world." "I'll admit to the double entendre ," Alis said. "What I meant—for the rest of Ohio and see how the Earth is getting along without us." "Delighted. But don't you have any classes?" "Sure I do. Non-Einsteinian Relativity 1, at nine o'clock. But I'm a demon class-cutter, which is why I'm still a Senior at my advanced age. On to the brink!" are you going to do?" "What can "Is it still? I mean hasn't it all poured off the edge by now? Was that Superior's water supply?" "That's funny. Come on let's follow it to the edge." "Down, I'd say. Rain for the Earth-people." "I should think it'd be all dried up by now. I'm going to have a look." "Don't! You'll fall off!" topographer's map, far below. Don took another wary step, then sat down. "I still can't see where the water goes," Don said. He stretched out on "Scared. When I get my courage back I'll pick up my head and look." Alis put a hand out tentatively, then purposefully took hold of his ankle and held it tight. "Just in case a high wind comes along," she said. tossed it to him. It rolled and Don had to grab to keep it from going isn't going off the edge!" "It isn't? Then where is it going?" sufficient to kill. It was signed: Vincent Grande, Chief of Police, "What's the other source, besides the faucet in your bathroom?" Don

<question>:
Which word least describes Don?

<options>:
A secretive
B calm
C inquisitive
D caring

<answer>:

D