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

<passage>:
mean, how do we know Superior is maintaining the same position up here "We could tell by the sun, silly." "Of course," he said, grinning at his stupidity. "And I guess we're not high enough to see very far. If we were we'd be able to see the Great The town of Superior, Ohio, certainly was living up to its name! In what was undoubtedly the most spectacular feat of the century, it simply 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 accepted their rise in the world as being due to one of their local that they know. Maybe we'll begin to get some answers. Or, if not to Cort: either find a way to anchor Superior, or spend the rest of his days on the smallest—and the nuttiest—planet in the galaxy! The town of Superior, Ohio, disappeared on the night of October 31. Superior had been. The state police converged on the former site of Superior from several The guard surrounded the area with troops—more than a thousand were needed—to keep people from falling into the pit. A pilot who flew over it reported that it looked as if a great ice-cream scoop had bitten into the Ohio countryside. 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 disappearance at midnight. The truck driver had made his discovery Nor had there been any defense plants in Superior that might have blown A United Airlines pilot found Superior early on the morning of November 1. The pilot, Captain Eric Studley, who had never seen a flying saucer and hoped never to see one, was afraid now that he had. The object course to avoid it. He noted with only minimum satisfaction that his A few minutes later he had relayed a message from Superior, formerly of It said that Superior had seceded from Earth. One other radio message came from Superior, now airborne, on that first " up here!" Don Cort had been dozing in what passed for the club car on the Buckeye Cannonball when the train braked to a stop. He looked out the window, hoping this was Columbus, where he planned to catch a plane east. But it wasn't Columbus. All he could see were some lanterns jogging as trainmen hurried along the tracks. The conductor looked into the car. The redhead across the aisle in whom Don had taken a passing interest earlier in the evening asked, "Why did we stop?" "Somebody flagged us down," the conductor said. "We don't make a station stop at Superior on this run." The girl's hair was a subtle red, but false. When Don had entered the indicated a tendency to arrange her expression into one of disapproval. nor ugly, and a habit of drawing the inside of his left cheek between 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 went down to the tracks. Don hesitated, shrugged at the redhead, said, "Excuse me," and followed the conductor. About a dozen people were milling around the train as it sat in the dark, hissing steam. Don made his way up to the locomotive and found a bigger knot of people gathered in front of the cowcatcher. Some sort of barricade had been put up across the tracks and it was an old red shirt. Don saw two men who must have been the engineer and the fireman talking to an old bearded gentleman wearing a civil defense helmet, a topcoat and riding boots. "You'd go over the edge, I tell you," the old gentleman was saying. "Look for yourself," the old man in the white helmet said. "Go ahead. Look." The engineer was exasperated. He turned to the fireman. "You look. Humor the old man. Then let's go." the horizon where stars could not properly be expected to be seen. Don Cort and the fireman walked cautiously toward the edge while the professor ambled ahead with the familiarity of one who had been there on the edge of his seat during the exciting part of a movie, but the "You see what I mean," he said. "You would have gone right over. I believe you would have had a two-mile fall." "Of course you could have stayed aboard the train," the man driving the old Pontiac said, "but I really think you'll be more comfortable at Cavalier." Don Cort, sitting in the back seat of the car with the redhead from the "Me? No. I'm the mayor of Superior. The old town's really come up in the "He has a theory about everything. I think what he was trying to convey the mayor wouldn't look foolish the next morning, not knowing his town "What's the population of Superior?" and forty, counting you people from the train. I guess you'll be with us for a while." "Well, I don't see how you can get down. Do you?" "Does Superior have an airport?" Don asked. "I've got to get back to—to He laughed quickly and loudly because she was getting uncomfortably close. "Oh, no. Nothing so glamorous. I'm a messenger for the Riggs National Bank, that's all. Where do you work?" " Cort!" she said, annoyed. "You know as well as I do that " comfortable," she said. "What a night, eh? The professor is simply Superior were up in the air. "How do you get down from an elephant? Old riddle. You don't down from ducks. How do you plan to get down from Superior?" "Scarcely , 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 "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 Ohio, as usual, today Superior ends literally at the town line. to him and said, "It's not on page one. Ed Clark and Mayor Civek don't today that Superior has seceded from Earth. His reasons were as vague as his explanation. The "reasons" include these: (1) Superior has been discriminated against and which (it being atrociously levitated Superior off the face of the "Not to me he doesn't. I'm one of those banes of his existence, a being a natural-born needler, and Father has disowned me intellectually you , Mr. Cort?" "I'll admit to the now—was that we can stroll out to where Superior used to be attached to 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 there?" "What can I do?" the conductor asked. "You can go over to Cavalier and have breakfast," Alis said. "Nobody's going to steal your old train." The conductor reckoned as how he might just do that, and did. "You know," Don said, "I was half-asleep last night but before the train stopped I thought it was running alongside a creek for a while." Superior's water supply?" "Don't! You'll fall off!" "It isn't? Then where is it going?" "Why? How?" said. The fence, which had a sign on it, warning—electrified , was

<question>:
Who seems to know the least about Superior's situation?

<options>:
A Professor Garet
B Don Cort
C Mayor Civek
D the train conductor

<answer>:

D