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

<passage>:
surface of the Moon's far side, and, to Earth. Pop matter-of-factly tended the shack and the landing field and the therefore, he occupied the shack on the Big Crack's edge, above the 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. Pop received the stores and Moon. All freight had to be hauled from Earth, on a voyage equal to to Earth. The rocket went away again. Come nightfall Pop rather more than a thousand times lowered the supplies down the long cable into the Big Crack to the colony far down inside, and freshened up the landing field marks with magnesium marking-powder if a rocket-blast sorts, but when warmed up in the shack they were useless. He found no strictly lunar material which would serve for modeling or carving portraits in the ground. He found gaping rocky fault which stretches nine hundred miles, jaggedly, over the side of the Moon that Earth Crack would have had to shut down. The Crack, of course, was that is nothing like it on Earth, of course. When it was first found, scientists descended into it to examine the exposed rock-strata and learn the history of the Moon before its craters were made. But they found more than history. They found the reason for the colony and the rocket landing field and the shack. mineral he required. Marble would have been perfect, but there is no marble on the Moon. Naturally! Yet The reason for Pop was something Pop continued to search absorbedly for material with which to capture but— Early one lunar morning he was a good two miles from his shack when he saw rocket-fumes in the and there were rocket-fumes coming over the horizon, not in the direction of Lunar City. Which was more impossible still. He stared. A tiny silver rocket to fresh, and all sorts of things to make life possible for men under if not on the Moon. But it wasn't fun, even underground. In the Moon's slight gravity, landing-area marked by silvery triangles. so easily. He knew about Pop, up on the surface. He'd shipped out, whimpering, to the Moon to get far away from Pop, and Pop was just the low gravity to tear a man's nerves to shreds. He has to develop down with the singular deliberation The first men to leave the colony had to be knocked cold and shipped out unconscious. They'd been underground—and It was just barely past lunar sunrise on the far side of the Moon. Incredibly long and utterly black of falling objects on the Moon. rocketship if Pop put a tarpaulin raising a trail of slowly settling powder. He knew only that the ship didn't come from Lunar City, but from Earth. He couldn't imagine why. He did not even wildly connect over their heads so they didn't have Then he blinked. There was a red-headed "This," snapped the red-headed good care of his job. There was a warning-bell in the shack, and when a rocketship from Lunar City got above the horizon and could send a The red-headed man leaned forward, tight beam, the gong clanged loudly, and went out the air lock. He usually reached the moondozer about the time the ship began to brake for "Pay attention!" snarled the red-headed the product of the mine, to be forwarded of jagged crater-walls. It slowed, and slowed, and curved down as it drew nearer. The pilot killed all forward The red-headed man hit him marked the landing place. "Move!" he rasped. "I want the diamonds you've got for the ship from Lunar City! Bring 'em!" Pop licked blood from his lips and the man with the weapon raged at him. Instantly the rockets cut off, drums of fuel and air and food came therefore, he wanted to hurt. the Moon. He panted: "And get it straight! You try any tricks and we take off! We that space-travel—then, at its beginning—produced. It was meaningless savagery due to terror. But, Moon and the mention of Sattell's name showed the uselessness of bluff. He'd pictured the complete set-up The red-headed man checked up for Lunar City, Pop tracked him. By that time he was quite sure that Sattell was the man who'd put things together. The red-headed the mine, for example. In each two Earth-weeks of working, the mine-colony and called the mine-colony down in the Crack. He gave the message he'd been told to pass on. Lunar City ship that would be due presently. Otherwise the ship on the landing strip would destroy shack and Pop and the colony together. "I'd guess," said Pop painstakingly, dead and the shacks smashed and the cable burnt through, they'll be back on Earth long before a new cable's been got and let down to you. So they'll do all they can no matter Moon in the first place because Sattell of the Moon. He was a rather fussy Earth newly-mined diamonds sometimes fly to pieces from internal stress. On the Moon, it was not desirable that diamonds be exposed to repeated violent changes of temperature. craters complained of the bombardment from space that had made them. touched up the glittering triangles which were landing guides for the Lunar City ships. They glittered from the thinnest conceivable layer of magnesium marking-powder. would have rubbed his hands. Tall, jagged crater-walls rose from the lunar plain. Monstrous, extended inky shadows stretched enormous distances, utterly black. When the red-headed man opened The red-headed man snarled. But occupation made it absurdly easy to live on the surface of the far side of the Moon, whether anybody else could do it or not. Sattell had no such device for adjusting to the lunar state of things. Living on the Moon was bad enough on. But his eyes went past the red-headed pounds on Earth. "Any tricks," he rasped, "and you know what happens!" need to escape became an obsession on top of the other psychotic states normal to a Moon-colonist. But he was helpless. He couldn't the trip back to Earth. And it blew, too. It would be minutes before all the fragments of the ship returned to the Moon's surface. On the Moon, things fall slowly. nothing. The Moon swung in vast circles about the Earth, and the Earth Pop didn't wait. He searched 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 What do we do?" "Don't do a thing," advised Pop. "It's all right. I blew up the ship and trip in history! One hundred thousand Lunar City and a landing in Aristarchus, plus sound-tapes of the journey and fame hitherto reserved for Moon's far side and trips through in order to recover memories of them. He began to plan, gloatingly, the happens when a self-centered and complacent individual unsuspectingly looks out of a spaceship port and sees the cosmos unshielded not endure his own smallness in the face of immensity. Not one passenger disembarked even for Lunar City. Most of them cowered in their chairs, hiding their eyes. They were The second luxury liner took off with only four passengers and turned back before reaching the Moon. Space-pilots could take the strain of space-flight because they had work to do. Workers for the lunar mines could make the trip under heavy sedation. But it was too early in the

<question>:
Why does the red-headed man come to the moon?

<options>:
A To kill Pop.
B To steal the diamonds.
C To rescue Sattell, the diamonds are his payment.
D To destroy the lunar colony.

<answer>:

C