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

<passage>:
prepared for the more humbling learned of it the same way. Pop didn't Sattell undoubtedly dealt with it surface of the Moon's far side, and, therefore, he occupied the shack on the Big Crack's edge, above the Sattell and he had reason not to 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. Moon. All freight had to be hauled from Earth, on a voyage equal to rather more than a thousand times around the equator of the Earth. to Earth. The rocket went away again. Come nightfall Pop lowered the supplies down the long shack they were useless. He found no strictly lunar material which would serve for modeling or carving 2 —in liquid oxygen, and then firing it with a spark. It exploded but— Early one lunar morning he was a good two miles from his shack when he saw rocket-fumes in the He thought often of Sattell, down over the horizon, not in the direction of Lunar City. Which was more impossible still. He stared. A tiny silver rocket to on the Moon. But it wasn't fun, even underground. In the Moon's slight gravity, But Sattell couldn't comfort himself 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 within half a mile, an air-lock door opened in the ship's side. But nothing came out of the lock. No space-suited down with the singular deliberation of falling objects on the Moon. It was just barely past lunar sunrise on the far side of the Moon. Incredibly long and utterly black out unconscious. They'd been underground—and in low gravity—long enough to be utterly unable to face 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 Sattell got the shakes when he why. He did not even wildly connect it with what—say—Sattell might Sattell. The facts spoke for themselves. no longer remember. He met Sattell to Pop that the sight of Sattell had though, and he hunted up Sattell lock-door. He saw that the interior of the ship was stripped and bare. But a spiral stairway descended from Sattell helped bring back. Pop was 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 tight beam, the gong clanged loudly, and Pop got into a vacuum-suit and went out the air lock. He usually reached the moondozer about the time the ship began to brake for landing, and he watched it come in. "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. out of the cargo-hatch and Pop swept Tell Sattell I'm here and he can forward with the dozer. It was a or the feel of one-sixth gravity on the Moon. He panted: "And get it straight! You try any tricks and we take off! We of Sattell. He knew he had plenty Sattell knowing what had happened of them at all. But Sattell stirred recover a good deal. When Sattell of course, Pop was helpless to resent When Sattell frenziedly tried to deny Even when Sattell—whimpering—signed up for Lunar City, Pop tracked him. By that time he was quite sure that Sattell was the man who'd killed his family. If so, Sattell had for wiping out everything that Pop He couldn't prove Sattell's guilt. he didn't really want Sattell to die. Somehow, the mention of Sattell had was simple. Sattell had planned this multi-million-dollar coup, as a man in prison might plan his break. The stripped interior of the ship identified it. It was one of the unsuccessful luxury-liners sold for scrap. Or perhaps it was stolen for the journey sometimes Pop wondered if Sattell regular cannister was sent up for the 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, "that Sattell figured it out. He's "No," said Pop, "they'll do it anyhow. the cable burnt through, they'll be back on Earth long before a new cable's been got and let down to you. tell Sattell a thing about it, if I were more back on Earth. He found a Sattell. He simply wanted to be near bucket. He dumped the diamonds casually into it. They floated downward Earth newly-mined diamonds sometimes fly to pieces from internal stress. On the Moon, it was not desirable that diamonds be exposed to Pop packed the cotton cloth in the dumped an equivalent quantity of pale-blue liquid oxygen into the liquid air that had been purified by liquid oxygen all about. He went out of the shack by the air lock. On the way, thinking about the moonscape. Pop Young meticulously touched up the glittering triangles which were landing guides for the Lunar City ships. They glittered from the thinnest conceivable would have rubbed his hands. Tall, jagged crater-walls rose from the lunar plain. Monstrous, extended so by keeping Sattell in mind he recovered hoist, if Sattell's coming up from 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 top of the other psychotic states normal to a Moon-colonist. kill Pop. He had no chance—and he 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. Pop didn't wait. He searched Sattell and Pop Young's missing 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, plus sound-tapes of the journey and fame hitherto reserved for to do with Pop or with Sattell. But There were just two passenger tours. The first was fully booked. But the passengers who paid so highly, expected to be pleasantly thrilled happens when a self-centered and complacent individual unsuspectingly looks out of a spaceship port and sees the cosmos unshielded worked, he'd think of Sattell, because parts Sattell had managed to get Sattell had committed. He felt, somehow, 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 passengers sobbed in improvised strait jackets. The first shipload started home. Fast. 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 development of space-travel for pleasure-passengers. They weren't

<question>:
How does Sattell hope to get rid of Pop?

<options>:
A Luring him down into the Big Crack and killing him
B Hiring an assassin from a neighboring planet
C Blowing up the shack near the edge of the Big Crack
D Escaping on board a secondhand lunar tour vessel

<answer>:

D