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

<passage>:
over there?" He patted her hand absent-mindedly. "I wonder if it's west at all. I mean, how do we know Superior is maintaining the same position up here as it used to down there?" Printed in U.S.A. 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 townspeople, a crackpot professor. 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 to Cort: either find a way to anchor Superior, or spend the rest of his I The town of Superior, Ohio, disappeared on the night of October 31. A truck driver named Pierce Knaubloch was the first to report it. He had been highballing west along Route 202, making up for the time he'd spent Superior had been. at the end of Don's handcuff began to talk to him. his first thought. He backed up two hundred feet, set out flares, then sped off to a telephone. The state police converged on the former site of Superior from several directions. Communicating by radiophone across the vast pit, they 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 shortly after midnight. Energy Commission denied that they had been conducting secret experiments. 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 A few minutes later he had relayed a message from Superior, formerly of Ohio, addressed to whom it might concern: It said that Superior had seceded from Earth. One other radio message came from Superior, now airborne, on that first day. A ham radio operator reported an unidentified voice as saying Don had taken a passing interest earlier in the evening asked, "Why did "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 club car he'd seen her hatless head from above and noticed that the hair that it was more than adequate. If the girl had given Don Cort more than that one glance, or if it had 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 Don saw two men who must have been the engineer and the fireman talking Don Cort and the fireman walked cautiously toward the edge while the Standing on tiptoe and repressing a touch of giddiness, Don looked over the mayor wouldn't look foolish the next morning, not knowing his town had flown the coop." "What's the population of Superior?" "What do you mean by that?" Jen Jervis asked. "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 "Washington?" Don said. "That's where I'm going. I mean where I was going before Superior became airborne. What do you do in Washington, Don Cort had slept, but not well. He had tried to fold the brief case to Superior were up in the air. He went through the dormitory. A few students were still sleeping. The "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?" "I'll find a way. I'm more interested at the moment in how I got up here." 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 apparently grave situation. Residents having business beyond the outskirts of town today are 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. A Citizens' Emergency Fence-Building Committee is being formed, but in dropped to the rest of the world in a plastic shatter-proof bottle, said 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 by county, state and federal agencies Don said, "I'm beginning to like this Ed Clark." double entendre ," Alis said. "What I meant—for now—was that we can stroll out to where Superior used to be attached to the rest of Ohio and see how the Earth is getting along without us." "Is it still? I mean hasn't it all poured off the edge by now? Was that Superior's water supply?" Alis shrugged. "All I know is you turn on the faucet and there's water. Let's go look at the creek." They found it coursing along between the banks. "Looks just about the same," she said. "That's funny. Come on let's follow it to the edge." Creek surging along, then nothing. In the distance a clump of trees, with a few autumn leaves still clinging to their branches, simply ended. "Where is the water going?" Don asked. "I can't make it out." "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!" "I'll be careful." He walked cautiously toward the edge. Alis followed topographer's map, far below. Don took another wary step, then sat down. "Chicken," said Alis. She laughed uncertainly, then she sat down, too. "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 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 end of the creek. "Now I've got it. The water isn't going off the edge!" "It isn't? Then where is it going?" "Down, of course, but it's as if it's going into a well, or a vertical tunnel, just short of the edge." "Why? How?" "The other end of the creek?" "Exactly." South Creek did not bisect Superior, as Don thought it might, but flowed in an arc through a southern segment of it. They had about two miles to go, past South Creek Bridge—which used to lead to Ladenburg, Alis , was semicircular, with each end at the edge and tarpaulins strung behind it so they could see the mouth of the creek. The water flowed from under the tarp and fence. "Look how it comes in spurts," Alis said. "As if it's being pumped." Smaller print on the sign said: Protecting mouth of South Creek, one of two sources of water for Superior. Electrical charge in fence is sufficient to kill. . "What's the other source, besides the faucet in your bathroom?" Don asked. "North Lake, maybe," Alis said. "People fish there but nobody's allowed

<question>:
What action did Don consider for testing the water flow in Superior?

<options>:
A Taking a rowboat over the edge to see what would happen.
B Jumping into North Lake to see if there was an electrical current.
C Swimming through the stream to see what would happen.
D Throwing something into the stream and seeing if it would funnel back into Superior.

<answer>:

A