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?" found out." mean, how do we know Superior is maintaining the same position up here Felicitas K. Wilson "We could tell by the sun, silly." "Of course," he said, grinning at his stupidity. "And I guess we're not THE CITY THAT RAN OFF THE MAP 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 picked itself up one night and rose two full miles above Earth! 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 high enough to see very far. If we were we'd be able to see the Great But after a couple of weeks of floating around, it began to be obvious on the underside of a wing. As it turned they imagined they could see that they know. Maybe we'll begin to get some answers. Or, if not 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. Knaubloch couldn't see the extent of the pit because it was too dark, The state police converged on the former site of Superior from several confirmed that the town undoubtedly was missing. They put in a call to 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 THE SIOUX SPACEMAN Someone pointed out that October 31 was Halloween and that midnight was when he came out the other side he reported that the pit was concave, relatively smooth, and did not smell of high explosives. He'd found no had been over the state. Washington said no. The Pentagon and the Atomic 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 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 " Cold wasn't Columbus. All he could see were some lanterns jogging as trainmen stop at Superior on this run." Her glance upward at that moment interrupted his examination, which had that it was more than adequate. But it was likely that all she noticed then was the brief case he reason why his interest in the redhead had been only passing. Some sort of barricade had been put up across the tracks and it was covered with every imaginable kind of warning device. There were red and even "You'd go over the edge, I tell you," the old gentleman was saying. The bearded man—he called himself Professor Garet—went off with the the horizon where stars could not properly be expected to be seen. Don Cort and the fireman walked cautiously toward the edge while the not one of your old ragged, random edges such as might have been caused by an explosion. This one had the feeling of design behind it. "You see what I mean," he said. "You would have gone right over. I "Me? No. I'm the mayor of Superior. The old town's really come up in the "Was there any sort of explosion?" Don asked. "No. There wasn't any sensation at all, as far as I noticed. I was "Magnology. As I say, the school isn't accredited. Well, Professor Garet telephoned and said, 'Hector'—that's my name, Hector Civek—'everything's up in the air.' He was having his little joke, of about it?" "He has a theory about everything. I think what he was trying to convey was that this—this levitation confirmed his magnology principle." "What's that?" Don asked. "I haven't the faintest idea. I'm a politician, not a scientist. Professor Garet went on about it for a while, on the telephone, about magnetism and gravity, but I think he was only calling as a courtesy, so the mayor wouldn't look foolish the next morning, not knowing his town had flown the coop." "What's the population of Superior?" "Does Superior have an airport?" Don asked. "I've got to get back to—to "I'm thinking," she said, "that I should have stayed with Aunt Hattie going before Superior became airborne. What do you do in Washington, " Cort!" she said, annoyed. "You know as well as I do that " II Don Cort had slept, but not well. He had tried to fold the brief case to himself at one end of a dormitory and he'd taken his pants off but had Superior were up in the air. He went through the dormitory. A few students were still sleeping. The visibly. First he'd eat, he decided, so he'd be strong enough to go take "The same," she said. "Also the only. A pity, because if there'd been two of us I'd have had a fifty-fifty chance of going to OSU. As it is, them scrambled tomorrow. Yes, Cavalier. Home of the crackpot theory and down from ducks. How do you plan to get down from Superior?" "I'll find a way. I'm more interested at the moment in how I got up here." "You were levitated, like everybody else." "You make it sound deliberate, Miss Garet, as if somebody hoisted a whole patch of real estate for some fell purpose." "I didn't know there were any." "Actually there's only one, the 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 Ohio, as usual, today Superior ends literally at the town line. the same exemption would apply to a dubious individual bent on Don skimmed the rest. "I don't see anything about it being deliberate." to him and said, "It's not on page one. Ed Clark and Mayor Civek don't Mayor Claims Secession From Earth 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 against the Superior Bubble Gum Company by unreasonably raising prices. (b) lacks space to publish and which (it being atrociously levitated Superior off the face of the 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 being a natural-born needler, and Father has disowned me intellectually morning a blonde was apparently making an advance that hadn't been "I'll admit to the now—was that we can stroll out to where Superior used to be attached to train was standing there with nowhere to go. It had been abandoned except for the conductor, who had dutifully spent the night aboard. "What The conductor reckoned as how he might just do that, and did. Superior's water supply?" The brink, as Alis called it, looked even more awesome by daylight. Everything stopped short. There were the remnants of a cornfield, with "Don't! You'll fall off!" a spell of dizziness to pass. The Earth was spread out like a isn't going off the edge!" "It isn't? Then where is it going?" "Why? How?" out of play, Don thought) and on to the edge again. But as they approached what they were forced to consider the source of said. The fence, which had a sign on it, warning—electrified , was semicircular, with each end at the edge and tarpaulins strung behind it

<question>:
Which theory didn't they rule out for how Superior went missing?

<options>:
A secret government experiments
B explosives
C factory explosion
D magnetized levitation

<answer>:

D