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

<passage>:
ALL DAY SEPTEMBER By ROGER KUYKENDALL Illustrated by van Dongen through space and time since it came into being. The light from the star In its last instant, the meteor fell on the Moon. It was impeded by Later, in Evans' tractor, he was telling his story: "... And I don't know how long I sat there after I found the water." He all of 'em. "The idea didn't come all at once, it took a long time for me to remember that water is made out of oxygen and hydrogen. When I remembered that, of course, I remembered that it can be separated with electricity. So I built this thing. "It runs an electric current through water, lets the oxygen loose in the room, and pipes the hydrogen outside. It doesn't work automatically, of course, so I run it about an hour a day. My oxygen level gauge shows how long." Evans, who had no watch, thought of the time as a quarter after The shadow line between day and night could be seen from the Moon to be "You're a genius, man!" Jones exclaimed. the first landing on the Moon. on the Moon!" sixteen days. When he saw the wrecked turbine, he knew that he wouldn't make it. By careful rationing, he could probably stretch his food out to more than a month. His drinking water—kept separate from the water in the reactor—might conceivably last just as long. But his oxygen was too carefully measured there was a four-day reserve. By diligent conservation, he might make it last an extra day. Four days reserve—plus one is five—plus sixteen days normal supply equals twenty-one days to live. In seventeen days he might be missed, but in seventeen days it would be of this, he reinspected the steam system, and found about three gallons of water frozen in the condenser. The condenser, like all condensers, was a device to convert steam into water, so that it could be reused in the boiler. This one had a tank and coils of tubing in the center of a the water in the condenser began to boil. This boiling lowered the temperature, and the condenser demonstrated its efficiency by quickly freezing the water in the tank. Evans sealed the turbine from the rest of the steam system by closing the shut-off valves. If there was any water in the boiler, it would operate the engine that drove the generator. The water would condense in the condenser, and with a little luck, melt the ice in there. Then, if the pump wasn't blocked by ice, it would return the water to the boiler. condenser." He opened the pipe again and poured nearly a half-gallon of water into the boiler. It was three days' supply of water, if it had been carefully used. It was one day's supply if used wastefully. It was ostentatious luxury for a man with a month's supply of water and twenty-one days to live. the boiler pressure began to fail, but the steam had melted some of the ice in the condenser, and the water pump began to function. accepted this without thinking about it. He had fallen into the habit of suggesting mildly anything that he wanted done, and writing orders he didn't particularly care to have obeyed. Mrs. Garth was simply the first four hours after waking. on the Moon for another week. "Has the power crew set up the solar furnace?" he asked. The solar anything that it was desirable to heat. It was used mostly, from sun-up to sun-down, to supplement the nuclear power plant. "They went out about an hour ago," she answered, "I suppose that's what they were going to do." "Very good, what's first on the schedule?" "A Mr. Phelps to see you," she said. they're in good order." "There doesn't seem to be any profit," Mr. Phelps said. "I know this seems like a silly question. What day is this?" There was a pause. "They say what day where?" she asked. "Greenwich, I guess, our official time is supposed to be Greenwich Mean Time." There was another pause. "Well, there you are," laughed McIlroy, "it isn't that time doesn't mean don't work." "Meteor shower," Cowalczk answered, "and that's not half of it. Walker Nobody answered. They could all see the Moon under their feet. Small across." All of these needed water to form, and their existence on the Moon puzzled him for a while. Then he opened the bag that had contained the the sun. The sun rose to the meridian slowly. It was a week after sunrise. The move around Earth. The continents drifted across the dark disk and into the crescent. The people on Earth saw the full moon set about the same time that the sun rose. Nickel Jones was the captain of a supply rocket. He made trips from and to the Moon about once a month, carrying supplies in and metal and ores "You may think it's myself running the ship," Jones started on his tirade, "but it's not. The union it is that says who I can hire. The union it is that says how much I must pay, and how large a crew I need. they need these things on Earth, but they can't get them as long as it isn't worth the carrying of them. And then, of course, there's the water we haven't got. We could afford to bring more water for more people, and set up more distilling plants if we had the money from the nickel. "Even though I say it who shouldn't, two-eighty a quart is too much to pay for water." Both men fell silent for a while. Then Jones spoke again: profit." "He's out prospecting again. I don't expect to see him until sun-down." "I'll likely see him then. I won't be loaded for another week and a "Because I say so," Cowalczk shouted, surprised at his outburst and ashamed of it. "Boiler scale," he continued, much calmer. "We've got to clean out the boilers once a year to make sure the tubes in the reactor don't clog up." He squinted through his dark visor at the reactor building, a gray concrete structure a quarter of a mile distant. "It The vat was a light plastic container used only to decant sludge out of the water. It neither needed nor had much strength. "Six now," said Cade. Cowalczk and Lehman stopped halfway to the reactor. The vat bulged and They could see the trickle of water from the discharge pipe. The motor turned the valve back and forth in response to Cade's signals. "We're probably O.K. in these suits for an hour," Cowalczk answered. "Is there a manual shut-off?" "Not that I know of," Lehman answered. "What about it, Cade?" engineer." "O.K., but keep working that switch." "No," Cade answered. "Water's stopped. Give us some pressure, we'll see if it holds." "Think we weren't worried?" Lehman asked. "And it's not over." "What?" Cade asked. "Oh, you mean the valve servo you two bashed up?" "No," said Lehman, "I mean the two thousand gallons of water that we lost." "Two thousand?" Cade asked. "We only had seven hundred gallons reserve. How come we can operate now?" "We picked up twelve hundred from the town sewage plant. What with using the solar furnace as a radiator, we can make do." "Oh, God, I suppose this means water rationing again." "You're probably right, at least until the next rocket lands in a couple of weeks." the Moon in search of minerals was due two days ago, but it was by the fact that Evans is lost on the part of the Moon which is now The light from Earth lighted the Moon as the Moon had never lighted are clouded over. Anyway the satellite observatory will be in position by the time Europe is." McIlroy was fully awake. He glanced at Phelps and wondered how long it

<question>:
How is time experienced by the people on the moon?

<options>:
A They track time based on both Earth and the moon
B They work in two-week shifts, built around supply runs
C They all live and work on an Earth schedule
D They plan their schedules around the water cycle

<answer>:

A