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

<passage>:
weapons of history that wasn't used in the last war. That doesn't mean it won't be used in the next! "Ah can patch the one where it came in, but it musta been explodin' Johnson spoke casually, but his voice in the intercom was thin with tension. "That's a good idea." Johnson was not usually very witty, but this was one he couldn't resist. "Never mind, Guns. A patch that big wouldn't be safe to hold air." could stick mah head through." Range about six hundred miles." on the way out. There's a hole Ah instinctive reaction. Nothing there invisible at half a mile. He squeezed the throttle mike button. "Any IFF?" "No IFF." "O.K., let me know as soon as you interphone crackled with the gregariousness born of recent peril, and have his course." Coulter squashed For ten or fifteen minutes, the gradually the ship fell silent as each "Got a bogey at three o'clock high. to hit. Then they'd let the bomb go Coulter scanned the full arch of sky visible through the curving panels of the dome, thinking the turgid and get out of there, and the bomb thoughts that always came when action out? Stick a proximity fuse on it, and His eyes and hands were busy in the familiar procedure, readying the ship for combat, checking and re-checking the details that could mean life and death, but his mind watched and slightly disapproving, with warmth and humor peeping through from underneath when she "How big would a rocket like that be?" the angry disappointment in her eyes hearing again his awkward apologies. spoke again. "Ah been thinkin', cap'n. With a little redecoratin', Ah welling up into a rush of tenderness and affection. He whispered her name, and suddenly he knew that if he got back he was going to ask her we'd get a bomb in the first place? "Sorry, cap'n. Ah just figured if you could get hold of a bomb, Ah know a few of the boys who could "Well, forget about it. It's not a bad idea, but we haven't any bomb." "Right, cap'n." Interrogation was brief. The mission had turned up nothing new. for Doc Miller's crew, and they made sure Miller and the boys heard about it. They were lightheaded with the elation that followed a successful mission, swapping insults with the above fifteen, she was trembling steadily. He didn't blame the old they'd probably have been spotted, and lost the precious element of surprise. He blessed the advantage of better And he was a little too polite to be easy company. him as he tried to read. He wasn't sure how he got there, the cradle as the power died. government says there's no war. His mind wandered back over eight years months of emotional adjustment in the screep. Primary training. Basic in 1979, the United States had won the Moon. What a grind it had been, A year later the Moon station had "blown up." No warning. No survivors. crater. And six months later, bombs stored at the station. The implication was clear enough. There wasn't going to be any Moon station until one government ruled Earth. Or until the United gimmick cooked up, to turn the U. S. S. R. upside down in a revolution, the next time power changed hands, but he'd been hearing that one Back on Earth, there was no war. The satellites, though naturally they were going to be any Moon station for a the day after that. Are you free?" Her hesitation was only momentary. "Well, I was going out—with a girl friend. But she'll understand. What's up?" tomorrow. And the day after, and all-out war a good risk. They hadn't found it yet, but it was getting bloodier out here all the time. For a while, What did you say? " It was a ticklish job explaining about Kovacs, but when she understood They made their arrangements quickly, and switched off. He hesitated a minute before he Sylvia, he'd be strictly persona non rocket on his chest. But he didn't grata unhappy thought. Well, maybe it was in a good cause. He shrugged and himself lecturing to a group of eager kids. called her. Had a couple of close calls, those That Red had looked easy, the way he was wandering around. He hadn't spotted them until they were well into their run, first heard his request, but he did some fast talking. The idea of several She nearly cut him off when she sudden deceleration.... and agreed to come. He switched off, adjusted the drape of his genuine Coulter shook his head at the memory. And on the last mission they'd "We're crossing his track, Paul. Turn to nine point five o'clock and moment, then asked gravely: "Would starting on the count ... five—four—three—two—one—go!" He completed the operation in silence, remarking with his finger. His voice was warm and confiding, but his eyes were far away. that dangled from the youngster's hand. He bent over and tapped it techniques were a bit irregular. Coulter chuckled at the ad lib way they operated, remembering the "I think next we're going to try a slingshot," he said. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed. Minor spelling and typographical errors —that was for sure. It was an have been corrected without note. during a fight when he had no more idea of his position than what the courses, the tests, the procedures practiced the Moon. with a Red, the Solter co-ordinates went out the hatch. They navigated fouling up the ships so they had on gimbals, and one where the whole ship rotated, and he hadn't cared for them at all. Felt disoriented, with something nagging at his mind all had gone nuts in the "spindizzy," and remembering his own feelings as to understand. Anyway, "right side up" tied in perfectly with the old "clock" system purple if he'd ever dreamed they'd use such a conglomeration. But degree off dead center. He made the final corrections in course, set the air Garrity sounded lazy as a well-fed tiger. "Ah'm with yew, cap'n." pass—a maneuver inherited from the aerial dogfight—though it often turned into something more like the clear him, praying that he won't break in the same direction. And to they were lucky, the twenty-two frantic seconds they were out here for—throwing are the worst. One hundred of deathly silence and deathly calm, feeling and hearing nothing standing and waiting in the silence, praying they weren't spotted—staring at the unmoving firmament and knowing he was a projectile hurtling you tell us how you kill a Red, sir?" hiss of the rockets was a to target. His eyes flicked from the sightscreen to the sky ahead, looking for the telltale flare of rockets—ready to follow like a ferret. At eighteen miles from target, a tiny blue light flickered ahead. He forgot everything but the They missed ramming by something until they could do them backwards THE END out every detail—the bright red star, even the tortured face of the pilot. Was there something lopsided in the shape of that rocket plume, or was he just imagining it in the blur of ping just at that instant, feel the his pass had given away. Guns spoke quietly to Johnson. And Johnny answered, hurt, "What do you think I'm doing down the plume was flaring unevenly, flickering red and orange along one side. Quietly and viciously, he was talking to himself. "Blow! Blow!" bit of fireworks, throwing tiny handfuls of sparks into the blackness. became aware that the red light was on for loss of air. The cabin pressure gauge read zero, and his heart throbbed into his throat as he remembered that pinging sound, just told Garrity to see if he could locate the loss, and any other damage, and was shortly startled by a low amazed whistle in his earphones.

<question>:
Why did the Moon stations blow up?

<options>:
A Reds blew it up
B Accident
C Americans blew it up
D Unclear

<answer>:

D