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

<passage>:
but the rebellious philosopher: for he destroys worlds. too small. At his back rose a cliff of jagged rock, losing its own insulating material. He might be able to hear the footsteps of his murderer conducted through the ground. it would have been heavy on Earth, but it was hardly enough to unscrew the stars and reset the machinery of a universe gone awry. He smiled stiffly at the thought. He wanted to laugh too, but checked himself for fear he wouldn't be able to stop. Let's face it , he told himself. sweatless. He wondered if he had spoken it aloud. had to be a hunter, too, and track down the other man, before he died. And if he found his enemy, he would probably die anyway. fields which had never known life. It was like being dead already. Bo Jonsson's tongue was dry and thick in his mouth. He wanted to find his enemy and give up, buy existence at whatever price it would command. But he couldn't do that. Even if the other man let him do it, revolution about the sun gives the departing ship a welcome boost, while minimizing the effects of Jupiter's drag. Moreover, being dense clusters, they have attracted swarms of miners, permanent boom town atmosphere. Even though a spaceship and equipment represent a large investment, this is one of the last strongholds of genuinely private enterprise: the prospector, the mine owner, the rockhound dreaming of the day when his stake is big enough for him to start out on his own—a race of individualists, rough and noisy and jealous, but living under iron rules of hospitality and rescue. Bo Jonsson into going there for a final spree before checkoff and departure. "Nothing to compare," he insisted. "Every place else is he didn't grate on Bo, they had been partners for several years now. drinks. Bo was larger and heavier than most spacemen—he'd never have with amiable blue eyes in a battered brown face, he did not consider himself bright, and always wanted to learn. synthetic alcohol, and a dash of caramel they have the gall to label whiskey and charge for!" "Everything's expensive here," said Bo mildly. "That's why so few rockhounds get rich. They make a lot of money, but they have to spend it just as fast to stay alive." "Yeh ... yeh ... wish they'd spend some of it on us." Johnny grinned and fed the dispenser another coin. It muttered to itself and slid and it's close quarters aboard the Dog "Because I am one at heart. Look, Bo, why don't you get over that inferiority complex of yours? A man can't run a spaceship without knowing more math and physical science than the average professor on "I don't, Johnny," said Bo. "I'll just nurse a beer." It wasn't morals so much as fastidiousness Bo chuckled. The Company consisted of (a) the (b) her crew, himself and Johnny (c) a warehouse, berth, and three other part owners else but she went wherever there was cargo or people to be moved. Her margin of profit was not great in spite of the charges, for a space trip is expensive but in a few more years they'd be able to buy getting some competition. Even the public lines might have to worry a little. Johnny put away another couple of shots and rose. Alcohol cost plenty, but it was also more effective in low-gee. "'Scuse me," he said. "I see a target. Sure you don't want me to ask if she has a friend?" Bo shook his head and watched his partner move off, swift in the puny Bo sighed, feeling a bit lonesome. If he wasn't going to make a night of it, there was no point in drinking heavily. He had to make the final inspection of the ship tomorrow, and grudged the cost of anti-hangover tablets. Besides what he was putting back into the business, he was trying to build a private hoard some day, he'd retire and get married "Run along and play, son," said Johnny. "Or do you want me to change that diaper of yours?" That was when it happened. Bo saw the little needler spit from the only clear thought which ran in the sudden storm of Bo's head. next face of the rough cube which was the asteroid. Bo lay on his belly much of an impetus to throw him off this rock entirely. Then his He moved with flat low-gee bounds. Besides the danger of springing off the asteroid entirely, there was its low acceleration to keep a man near the ground Bo stood unmoving an instant, fighting the impulse to leap away. He was a spaceman, not a rockhound he wasn't used to this environment, and if he jumped high he could be riddled as he fell slowly down again. Sweat might get too tired at the critical moments. Bo knew he wouldn't be allowed to leave Achilles without a certified partner, and unemployed Bo didn't care the first day. He had taken Johnny out to Helmet Hill his main thought a dull dread of having to tell Johnny's father when he reached Luna. He was too slow and clumsy with words from Saturn to the sun, his blood was strewn for nothing. It hardly seemed to matter that the Guards office reported itself "Hadn't you heard?" asked Bo. He found it hard to believe she could Luna with you." "Your ticket will be refunded, of course," said Bo heavily. "But you aren't certified, and the Sirius Bo shrugged, not caring much. "I'll circulate an ad if you want, but—" danced and laughed and flirted mildly, but even the dullest rockhound intelligent women, and he was getting tired of rootlessness. But of course it would be a catastrophe if he fell in love with her because she wouldn't look twice at a big dumb slob like him. He had sweated out a couple of similar affairs in the past and didn't want to go through another. doing at any given time. The Drake had come to Achilles to pick up a cargo of refined thorium for Earth somehow lost a few hundred pounds of reaction-mass water from a cracked gasket. Why the accident should have occurred, nobody knew ... spacemen Bo had heard of it in the course of Lundgard nodded. "She did. It was the usual question of economics. You know what refined fuel water costs in the Belt also, the delay him behind the difference in mass would make up for the fuel loss. I volunteered, even suggested the idea, because ... well, it happened during my watch, and even if nobody blamed me I couldn't help feeling guilty." Bo understood that kind of loyalty. You couldn't travel space without "Against six months here?" Lundgard laughed it emphasized the bright charm of his manner. "Sunblaze. I'll work for free." "No need to. Bring your papers over tomorrow, huh?" The certificate and record were perfectly in order, showing Einar "Oh, yes. I had some fool idea about settling but soon learned better. I tried to farm, but when you have to carve your own land out of modified, no trip ever turned out just as predicted, but that could be done when needed with a slipstick and the little ship's calculator. Bo went at his share of the job doggedly, checking and re-checking before giving the problem to the machine Lundgard breezed through it and spent his time while waiting for Bo in swapping dirty limericks of rockets. Bo relaxed against the thrust, thinking of Achilles falling away behind Bo clamped his teeth together, as if he would grip consciousness in his jaws. His hands felt cold and heavy, the hands of a stranger, as straining to break loose and kill him. Bo's mind wavered back toward life. He opened the valves wide on his tanks, and his thermostatic capacitors pumped heat back into him. For to lie on naked rock while the enemy hunted him. Bo shuddered and

<question>:
Why does Bo say that rockhounds will never become rich?

<options>:
A He says that they spend their money on women rather than saving it.
B He says that they spend all of their money.
C He does not say that at all because he is aware that they make a lot of money.
D He knows that the government takes huge taxes from their wages.

<answer>:

B