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

<passage>:
enterprise through the micro-tapes surface of the Moon's far side, and, to Earth. Pop matter-of-factly tended the shack and the landing field and the popping up in his recollection. Times when he was happy. One By day the environment was heat and torment. By night—lunar night, of course, and lunar day—it was frigidity and horror. Once in two weeks Earth-time a rocketship came around the horizon from Lunar City with stores for the colony deep underground. his again. Thereafter he could remember Moon. All freight had to be hauled from Earth, on a voyage equal to to Earth. The rocket went rather more than a thousand times around the equator of the Earth. away again. Come nightfall Pop lowered the supplies down the long cable into the Big Crack to the colony Artists' supplies were not often included. Pop didn't even ask. the landing field marks with magnesium no strictly lunar material which nine hundred miles, jaggedly, over the side of the Moon that Earth never sees. There is one stretch where it is a yawning gulf a full half-mile 2 —in liquid oxygen, and then firing it with a spark. It exploded a full mile down, in one wall. There is nothing like it on Earth, of course. of the Moon before its craters for the colony and the rocket landing memory. Sattell still seemed necessary, but— Early one lunar morning he was a good two miles from his shack in the colony underground. There of Lunar City. Which was more on the Moon. Sometimes it does. But Sattell couldn't comfort himself up on the surface. He'd shipped out, whimpering, to the Moon to get far It was just barely past lunar sunrise There were just two passenger didn't come from Lunar City, but from Earth. He couldn't imagine and on beyond it collected as restless, time he took the job tending the shack, he was pretty certain about containing a hundred Earth-pounds weight of richness. a thing. Not then. It was something of a blessing. But when he was physically recovered he set about trying to pick All of which happened back on Earth and a long time ago. It seemed So a thermware-lined cannister it any time he chose. He did And Sattell went into panic when he returned. Nowadays, by the Big Crack, Pop a rocketship from Lunar City got took care of them. He handed over reached the moondozer about the drums of fuel and air and food came from Lunar City! Bring 'em!" Pop diamonds you've got for the ship did, fuel and air and food came the Moon. He panted: absorbedly from city to city, to recover the years that had been wiped out by an axe-blow. He did of his married life. Even when Sattell—whimpering—signed up for Lunar City, Pop tracked profited by less than two days' pay for wiping out everything that Pop the mine, for example. In each two Earth-weeks of working, the mine-colony nearly filled up a three-gallon cannister with greasy-seeming white crystals shaped like two pyramids would weigh a hundred pounds on Earth. Here it weighed eighteen. But on Earth its contents would be computed in carats, and a hundred on the Moon Pop kept a waiting cannister diamonds worth at least five million dollars waiting for them, and the whole job might not have called for more than two men—with Sattell as a third. According to the economics of crime, it was feasible. Anyhow it was being done. a woman and two children and think a hundred dollars, what enormity would he commit for a three-gallon and called the mine-colony down in the Crack. He gave the speculation. The sun rose very, very slowly in what by convention was called the east. It took nearly two hours to urge its disk above the Lunar City ship that would be due emptiness for fourteen times twenty-four hours before sunset. Then there was night, and for three hundred and thirty-six consecutive hours there were only stars overhead and the and Pop and the colony together. presently. Otherwise the ship on the horizon, and it burned terribly in are here—not right this minute he won't." landing strip would destroy shack the nagging sensation of one-sixth gravity—tended to lose all confidence dead and the shacks smashed and the cable burnt through, they'll be back on Earth long before a new keep on waiting for this to happen. It'll save you trouble." of the Moon. He was a rather fussy he'd killed a man for no more than two children, playing together. He looked forward to remembering and worked on the emptied cannister. It was a double container with a thermware interior lining. Even on Earth newly-mined diamonds sometimes 2 froze solidly out of it there, and CO time, liquid air from another tank evaporated to maintain the proper air pressure in the shack. Every so repeated violent changes of temperature. moisture froze, and lumps of water ice clattered out to be returned to the humidifier. Less often he took out the CO 2 snow, and measured it, and dumped an equivalent quantity of kept them at mine-temperature once from space that had made them. scarce, but he spent most of the time between two particular rocket-landings getting down on paper exactly Sattell, he suddenly recovered a completely new memory. On their first wedding anniversary, so long ago, he and his wife had gone out to dinner to celebrate. He remembered together for always, with one complete year for proof. Pop reflected hungrily that it was something else to be made permanent and inspected from time to time. for the Lunar City ships. They glittered permanent and to extend it— If it had not been for his vacuum everything that his job and survival required. Ungrudgingly. from the lunar plain. Monstrous, extended Then he made more sketches. The calmly: "Now I've got to go handle the contents should weigh a hundred pounds on Earth. "Any tricks," he rasped, "and you know what happens!" was recovering it bit by bit. The occupation made it absurdly easy to to the lunar state of things. Living on the Moon was bad enough anyhow, then, but living one mile normal to a Moon-colonist. letters back to Earth. He did that. hadn't equaled—say—T.N.T. But the ship had fuel on board for a long time his letters produced nothing. The Moon swung in vast circles about the Earth, and the Earth to the Moon's surface. On the Moon, swung sedately about the Sun. The the trip back to Earth. And it blew, too. It would be minutes before all Sattell and Pop Young's missing years. Somebody back on Earth promoted a luxury passenger-line of spaceships to ply between Earth and Moon. It looked like a perfect set-up. Three spacecraft capable of the journey came into being with attendant reams of publicity. They promised a thrill and a new distinction for the rich. Guided tours to Lunar! The most expensive and most thrilling trip in history! One hundred thousand dollars for a twelve-day cruise through space, with views of the Moon's far side and trips through Lunar City and a landing in Aristarchus, it did. in order to recover memories of them. He began to plan, gloatingly, the thing he would carve out of a four-inch tours. The first was fully booked. But the passengers who paid so highly, worked, he'd think of Sattell, because that was the way to get back the missing portions of his life—the expected to be pleasantly thrilled away from him. He'd get back more than ever, now! He didn't wonder what he'd do until he'd recovered all the rest. disembarked even for Lunar Gloating, it was amusing to remember the simple cases of hysteria. But the richest girl on Earth, who'd had five catatonic withdrawal and neither saw nor heard nor moved. Two other strait jackets. The first shipload started home. Fast. The second luxury liner took off back before reaching the Moon. to do. Workers for the lunar mines

<question>:
How often does the Lunar colony get supplies delivered from earth?

<options>:
A Every twelve days
B Every three months
C Once a month
D Every two weeks

<answer>:

D