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

<passage>:
gently hellish, from the viewpoint of the to have nothing to do with him. But surface of the Moon's far side, and, to Earth. the Big Crack's edge, above the shack and the landing field and the Quite accidentally, he developed of the physical appearance of hell. By day the environment was heat and torment. By night—lunar night, of course, and lunar day—it was frigidity the horizon from Lunar City with Moon. All freight had to be hauled to Earth. The rocket went around the equator of the Earth. the landing field marks with magnesium no strictly lunar material which Crack would have had to shut down. the side of the Moon that Earth is nothing like it on Earth, of course. descended into it to examine the exposed of the Moon before its craters opened in the ship's side. But nothing marble on the Moon. Naturally! Yet from the Big Crack's edge. It looked like a dust-heap thirty feet high, and it was. The outside was surface had to be knocked cold and shipped Early one lunar morning he was of Lunar City. Which was more impossible still. air-tight bulkheads for safety, and a the westward poured out monstrous It curved downward. The rockets on the Moon. But it wasn't fun, even underground. In the Moon's slight gravity, of agoraphobia. With such an aid, a cubbyhole, and feel solidity above It was an altogether clumsy landing. The ship was not even perfectly vertical landing-area marked by silvery triangles. One of its tail-fins crumpled slightly. It tilted a little when fully whimpering, to the Moon to get far no way to get around him. It was difficult to get away from the mine, within half a mile, an air-lock door the low gravity to tear a man's came out of the lock. No space-suited kinks in his head to survive. And down with the singular deliberation of falling objects on the Moon. those kinks— on the far side of the Moon. in low gravity—long enough to be utterly unable to face and half the rocketship was dazzling the idea of open spaces. Even now white and half was blacker than The first men to leave the colony It was just barely past lunar sunrise over their heads so they didn't have but there were some tougher didn't come from Lunar City, but why. He did not even wildly connect The air-lock was perfectly normal He pulled the outer door shut and jerk which removed it. "Don't come in!" he said mockingly. "And I don't give a damn about how you are. This isn't social. memories. They were not sharp, though, and he hunted up Sattell again to find out if he was right. It's business!" lock-door. He saw that the interior plastic. The walls were bare insulation, a rocketship from Lunar City got and went out the air lock. He usually weapon. It drew blood. It was wanton, savage brutality. "Pay attention!" snarled the red-headed man. "A stickup, I said! Get reached the moondozer about the of jagged crater-walls. It slowed, and therefore, he wanted to hurt. "Move!" he rasped. "I want the from Lunar City! Bring 'em!" Pop licked blood from his lips and the man with the weapon raged at him. to cover up the cargo. It was necessary. at space-shadow temperature, the foil quivering if he wasn't used to space or the feel of one-sixth gravity on the Moon. He panted: swing over your shack! The rocket-blast smashes it! We burn you down! Then we swing over the cable melts it! You die and everybody that space-travel—then, at its memories of his wife—and the way savagery due to terror. But, of course, Pop was helpless to resent it. There were no weapons on the he'd felt about her—and some fugitive could do nothing. sealed it. The outer door opened. Outrushing air tugged at Pop. After to the ground. side of the Moon, Pop Young had cannister with greasy-seeming white crystals shaped like two pyramids base to base. The filled cannister would weigh a hundred pounds on Earth. Here it weighed eighteen. But on Earth its contents would be computed behind the air-apparatus. It rattled hours to urge its disk above the Lunar City ship that would be due landing strip would destroy shack were only stars overhead and the keep you from holding him down there. But he won't know his friends gravity—tended to lose all confidence "No," said Pop, "they'll do it anyhow. If we were able to tell about 'em, they'd be chased. But if I'm Moon in the first place because Sattell So they'll do all they can no matter grisly humor—Pop didn't even hate when they stopped. One-sixth gravity. so for the far side of the Moon. He was a rather fussy unfailing source of extreme low He tore bed linen from his bunk froze solidly out of it there, stress. On the Moon, it was not desirable that diamonds be exposed to repeated violent changes of temperature. moisture froze, and lumps of water the men in the rocket were shaky and its bulb, exposing the filament within. in balance. He poured the frigid, Outside the shack, jagged stony craters complained of the bombardment pushed the cannister-top down. He break a frozen-brittle switch as it descended. When it came off, the magnesium in contact with it and between two particular rocket-landings abomination of desolation which was He checked over the moondozer. Tall, jagged crater-walls rose from the lunar plain. Monstrous, extended floated low at the edge of things and seemed to hate all creation. whined. His suit sagged against his the inner door, the hand-weapon pounds on Earth. live on the surface of the far side of the Moon, whether anybody else "Any tricks," he rasped, "and you know what happens!" to the lunar state of things. Living on the Moon was bad enough down, inside the ship, from some had made no overt attempt to revenge himself because he planned some retaliation so horrible and lingering the outer. Air rushed out. He ferocity. And fear. In his mind the need to escape became an obsession on top of the other psychotic states normal to a Moon-colonist. There was the most luridly bright leave. There was Pop. He couldn't The rocketship was still in the act in liquid oxygen is not quite as He wrote with the desperate, impassioned, frantic blend of persuasion and information and genius-like invention of a prisoner in a high-security the trip back to Earth. And it blew, 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 to ply between Earth and Moon. It looked like a perfect set-up. 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, and fame hitherto reserved for honest explorers! the plastic zestfully on the table There were just two passenger them. He began to plan, gloatingly, the thing he would carve out of a four-inch section of the plastic. When it and shielded from all reasons for happens when a self-centered alarm. And they couldn't be. Something and complacent individual unsuspectingly looks out of a spaceship blindness against reality. It is shattering. not endure his own smallness in the face of immensity. Not one passenger disembarked even for Lunar City. Most of them cowered in their 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

<question>:
What makes the far side of the moon intolerable?

<options>:
A extreme temperatures
B loud noises from the mines
C social isolation
D vicious predators

<answer>:

A