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

<passage>:
catfooting too softly to set up vibrations. A man could do that when gravity was feeble enough. them, he did not exist, and they would shine carelessly long after he was gone into night. with him, hunting him down. Bo Jonsson looked at the wrench in his hand. It was long and massive, 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. 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. 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. even for that planetoid, it is a rowdy bar where Guardsmen come in trios. But Johnny Malone liked it, and talked Bo Jonsson into going there for a final spree before checkoff and cubicle while Johnny, squinting through a reeking smoke-haze, dialed drinks. Bo was larger and heavier than most spacemen—he'd never have gotten his certificate before the ion drive came in—and was usually content to let others talk while he listened. A placid blond giant, with amiable blue eyes in a battered brown face, he did not consider Bo chuckled. The Company consisted of (a) the Sirius (b) her crew, himself and Johnny Bo shook his head and watched his partner move off, swift in the puny gravity—the Last Chance didn't centrifuge like some of the tommicker minutes. 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 "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 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 soundless shower of chips. The bullet ricocheted flatly, heading off for outer space. No meteor gravel, that! 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 or three are required for non-military craft. This is not only an emergency reserve, but a preventive of emergencies, for one man alone might get too tired at the critical moments. Bo knew he wouldn't be allowed to leave Achilles without a certified partner, and unemployed snowfall. Bo didn't care the first day. He had taken Johnny out to Helmet Hill and laid him in the barren ground to wait, unchanging now, till Judgement Day. He felt empty then, drained of grief and hope alike, 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 his comforting strewn for nothing. It hardly seemed to matter that the Guards office reported itself unable to find the murderer. A single Venusian should have been easy to trace on Achilles, but he seemed to have vanished completely. be ignorant, here where everybody's life was known to everybody else. "Johnny's dead. We can't leave." "Oh ... I'm sorry. He was such a nice little man—I've been in the lab all the time, packing my things, and didn't know." A frown crossed her Luna with you." "Your ticket will be refunded, of course," said Bo heavily. "But you aren't certified, and the Sirius operators." "Well ... damn! There won't be another berth for weeks, and I've got to get home. Can't you find somebody?" Achilles for about a year working on some special project and was now ready to go home. 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. wassail. Already his friend was cold under the stars. In the course of the evening he found himself weeping. He woke up many hours later. Achilles ran on Earth time but did not rotate on it officially, it was late at night, actually the shrunken sun was high over the domes. The man in the upper bunk said there was a message for him appeared in the screen. Lundgard was a tall and supple man, somehow Bo felt his mouth gape open. "Huh? I never thought—" "We're both lucky, I guess." Lundgard chuckled. His English had only the slightest trace of accent, less than Bo's. "I thought I was stashed here too for the next several months." "How does a qualified spaceman happen to be marooned?" "I'm with Fireball, was on the Drake while she lay in orbit, she had somehow lost a few hundred pounds of reaction-mass water from a cracked gasket. Why the accident should have occurred, nobody knew ... spacemen were not careless about inspections, and what reason would anyone have for sabotage? The event had taken place about a month ago, when the Sirius was already enroute here position, which'd make the trip home that much more expensive. Since we had one more man aboard than really required, it was cheaper to leave 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 "The Company beamed a message: I'd stay here till their schedule permitted an undermanned ship to come by, but that wouldn't be for "Against six months here?" Lundgard laughed Lundgard to be a Spacetech 1/cl with eight years' experience, 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 In another minute, he would be knotted and screaming from the bends, and a couple of minutes later he would be dead. 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 The plastic patch stuck to his metal gauntlet. He peeled it off, trying not to howl with the fury ripping in his nerves. His body was slow, inert, a thing to fight. There was no more feeling in his back, was he dead already? the sucking vacuum. The patch bellied out from internal air pressure, straining to break loose and kill him. Bo's mind wavered back toward life. He opened the valves wide on his Born, spewed out of an iron womb into a hollowness of stars and cold, to lie on naked rock while the enemy hunted him. Bo shuddered and have spent most of its force punching through the armor, caromed off the inside, scratched his ribs, and fallen dead. Next time he probably hours worth left. Lundgard could kill him simply by waiting. sleepy. His eyelids felt heavy, strange that they should be so heavy on an asteroid. He wanted terribly to sleep.

<question>:
Why did Lundgard not ride home on his original ship?

<options>:
A He wanted to settle down and try farming
B He wanted to stay for another 6 months
C He offered to stay behind because he felt responsible for their problems
D He was left behind because he was careless about inspections

<answer>:

C