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

<passage>:
what would happen?" "I know one thing—I wouldn't be there holding your ankle while you found out." Radio messages stated simply that Superior had seceded from Earth. But Don Cort, stranded on that rising town, was beginning to suspect that nothing was simple about Superior except its citizens. Calmly they But after a couple of weeks of floating around, it began to be obvious that the professor had no idea how to get them down. So then it was up I don't get out of this handcuff soon so I can take a bath and get into The town of Superior, Ohio, disappeared on the night of October 31. clean clothes, you're not going to like me." over a second cup of coffee in a diner, when he screeched to a stop. If he'd gone another twenty-five feet he'd have gone into the pit where Superior had been. at the end of Don's handcuff began to talk to him. They were in the midst of an extremely pleasant kiss when the brief case she said, "before you deteriorate." The state police converged on the former site of Superior from several The Pennsylvania Railroad complained that one of its passenger trains was missing. The train's schedule called for it to pass through but not stop at Superior at 11:58. That seemed to fix the time of the Somebody else said nonsense, they'd better check for radiation. A civil defense official brought up a Geiger counter, but no matter how he shook it and rapped on it, it refused to click. A National Guard officer volunteered to take a jeep down into the pit, having found a spot that seemed navigable. He was gone a long time but Nor had there been any defense plants in Superior that might have blown course to avoid it. He noted with only minimum satisfaction that his co-pilot also saw the thing and wondered why it wasn't moving at the terrific speed flying saucers were allegedly capable of. A few minutes later he had relayed a message from Superior, formerly of It said that Superior had seceded from Earth. Don Cort had been dozing in what passed for the club car on the Buckeye Don had taken a passing interest earlier in the evening asked, "Why did stop at Superior on this run." The girl's hair was a subtle red, but false. When Don had entered the his teeth and nibbling at it thoughtfully. But it was likely that all she noticed then was the brief case he carried, attached by a chain to a handcuff on his left wrist. "Will we be here long?" Don asked the conductor. He didn't want to miss his plane at Columbus. The sooner he got to Washington, the sooner he'd get rid of the brief case. The handcuff it was attached to was one reason why his interest in the redhead had been only passing. "Can't say," the conductor told him. He let the door close again and 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 Standing on tiptoe and repressing a touch of giddiness, Don looked over Don Cort, sitting in the back seat of the car with the redhead from the "Does Superior have an airport?" Don asked. "I've got to get back to—to "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 this cuff." He took her bag in his free hand and they were met by a gray-haired around a corner, gesticulating wildly to someone wearing a white laboratory smock. II Don Cort had slept, but not well. He had tried to fold the brief case to pull it through his sleeve so he could take his coat off, but whatever was inside the brief case was too big. Cavalier had given him a room to himself at one end of a dormitory and he'd taken his pants off but had had to sleep with his coat and shirt on. He got up, feeling gritty, and did what little dressing was necessary. It was eight o'clock, according to the watch on the unhandcuffed wrist, and things were going on. He had a view of the campus from his window. A Superior were up in the air. He went through the dormitory. A few students were still sleeping. The others had gone from their unmade beds. He shivered as he stepped outdoors. It was crisp, if not freezing, and his breath came out visibly. First he'd eat, he decided, so he'd be strong enough to go take a good look over the edge, in broad daylight, to the Earth below. "Thanks," he said, unloading his tray. "How did you know?" "The mystery man with the handcuff. You'd be hard to miss. I'm Alis—that's A-l-i-s, not A-l-i-c-e—Garet. Are you with the FBI? Or did you escape from jail?" "I'm sure it's not that bad. Thanks. As for tomorrow, I hope to be out of here by then." "How do you get down from an elephant? Old riddle. You don't you get down from ducks. How do you plan to get down from Superior?" Superior Sentry "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 advised not to. It's a long way down. Where Superior was surrounded by today that Superior has seceded from Earth. His reasons were as vague as The "reasons" include these: (1) Superior has been discriminated against (b) lacks space to publish and which (it being atrociously handwritten) he (c) has not the temerity to ask his linotype operator to levitated Superior off the face of the 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." They walked south from the campus and came to the railroad track. The train was standing there with nowhere to go. It had been abandoned except for the conductor, who had dutifully spent the night aboard. "What's happening?" he asked when he saw them. "Any word from down Superior's water supply?" "Where is the water going?" Don asked. "I can't make it out." "I should think it'd be all dried up by now. I'm going to have a look." "Don't! You'll fall off!" "I'll be careful." He walked cautiously toward the edge. Alis followed "I still can't see where the water goes," Don said. He stretched out on his stomach and began to inch forward. "You stay there." Finally he had inched to a point where, by stretching out a hand, he could almost reach the edge. He gave another wriggle and the fingers of his right hand closed over the brink. For a moment he lay there, panting, head pressed to the ground. ankle and held it tight. "Just in case a high wind comes along," she said. "Thanks. It helps. Okay, here we go." He lifted his head. "Damn." "It still isn't clear. Do you have a pocket mirror?" "I have a compact." She took it out of her bag with her free hand and tossed it to him. It rolled and Don had to grab to keep it from going over the edge. Alis gave a little shriek. Don was momentarily unnerved and had to put his head back on the ground. "Sorry," she said. Don opened the compact and carefully transferred it to his right hand. He held it out beyond the edge and peered into it, focusing it on the "What's the other source, besides the faucet in your bathroom?" Don

<question>:
Why was Don unable to shower while on Superior?

<options>:
A He feared that someone would steal the briefcase if he left it unattended.
B The water supply was lacking from the stream flowing out of Superior.
C There was an electrical current flowing throughout the water in Superior.
D He was unable to remove the briefcase in order to remove his clothing,

<answer>:

D