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

<passage>:
to smile ... if he ever laughed at himself, the entire ship and crew were as good as dead! If there is anything I am afraid of, and there probably is, it is The Admiralty, however, is a very thorough group of men. Before they open a planet to colonization or even fraternization, they insist on knowing just what they are up against. Accident Prones can find out what is wrong with a planet as easily the whole world. A single pit of quicksand on a veritable Eden of a planet and a Prone will be knee-deep in it within an hour of blastdown. If an alien race will smile patronizingly on your heroic attempts at genocide, but be offended into a murderous religious frenzy if you blow your nose, you can take the long end of the odds that the Prone will almost immediately catch a cold. begin our re-survey of the planet. It was Charlie's first assignment, the casualty rate was with Prones aboard spaceships and now he was Actually Charlie was safer in space than he would be back on Earth took to safeguard him, the armed men who went with him everywhere, the Accident Prone First Aid Kit with spare parts for him, blood, eyes, companies on Earth discovered them when they found out in the last part been used to explain or explain away prones. I have my own ideas. I think an accident prone is simply a super-genius with a super-doubt of himself. I believe accident prones have a better system of calculation than a cybernetic machine. They can take everything into consideration—the infallibly make the right choice in any given situation. Then, because they are incapable of trusting themselves, they do exactly the opposite. I felt a little sorry for Charlie Baxter, but I was Captain of the out of the jinx that traps them. Usually they come to discover this His clumsiness back on Earth had cost him every decent job he ever had. captain. and Elliot escorted him down to the men's room, Captain Jackson." "No sir," Bronoski said wearily. "He told us it was out of order." effort was spared to insure comfort for the key man in the whole crew. were missing. Baxter had left the spaceship and gone off into an alien Elliot and Sidney, the guards, were absolutely prohibited from interfering in any way with a Prone's decisions. They merely had to I grabbed up a translator collar and tossed one to Bronoski. Then, just as we were getting into the airlock, I remembered something and ran Bronoski picked up Baxter's tracks and those of the two guards, Elliot perfectly shielded. I read that before the last exploration party had I raised my head cautiously to see if Bronoski would shove it back have anything to worry about, that the precious Accident Prone would come out of it alive. After all, Elliot and Sidney were there to protect him. They had machine guns, flame-throwers, atomic grenades, and some really potent weapons. They could handle the situation. I didn't have a thing to worry about. So why couldn't I stop shaking? The three men were just standing still, waiting for the aliens to make the first move. The natives looked just as worried as Charlie and his cybernetic unit back on board the spaceship tried decoding the words. Baxter swallowed and started forward to meet the alien halfway. His Before he could perform his usual pratfall, Sidney and Elliot were and shrugged them off, informing them wordlessly that he would have regained his balance if they had given him half a chance. a mistake and later I wanted to be sure I knew just what it was. Frankly, I would have used the blood-brother gambit myself. I had also read about it in the survey report, as I made a point of telling you. This just proves that Accident Prones haven't secured the franchise on brother?" "Sure," Charlie said. Dispassionately but automatically, the alien launched himself at the Prone's throat. Charterson and Von Elderman instantly went into action. Elliot Charterson jumped to Charlie's assistance while Sidney Von Elderman swung around to protect Charlie from the rest of the crowd. But the defense didn't work. The other aliens didn't try to get to Baxter, but when they saw Elliot off Elliot and let him get to work, except his training told him that defended. He started toward Charlie Baxter and was immediately pulled unholy, indecent and dastardly to interfere. I could fairly hear Bronoski's steel muscles preparing for battle as he saw his two mammoth pals go down under the press of numbers. A greet the aliens. He was determined to be useful and necessary without was supposed to do. But he couldn't lick that doubt of himself that had been ground into him since birth and there he was, in trouble as always. Now maybe Bronoski and I could get him out ourselves by a direct approach, but Charlie would probably lose all self-confidence and sink down into accepting himself as an Accident Prone, a purely passive instead of continuing to box him. I grabbed Bronoski by his puffy ear and hissed some commands into kid. I did. I guess all kids have. You know, worrying around two lumps of fissionable material and just keeping them from uniting and making a critical mass that will result in an explosion or lethal radiation. I caught my oldest boy doing it one day back on Earth and gave him a good tanning for it. Actually I thought it showed he had a lot of grit. I got the shield off my cigarette lighter and jerked out the dinky bricks toward each other with the point of my lead pencil. I heard something that resembled a death rattle come from Charlie's throat as the fingers of the alien closed down on it and my hand away from me. The explosion was a dud. It lit up the jungle for a radius of half a mile like a giant flashbulb, but it exploded only about ten times as loud as a pistol shot. The mass hadn't been slapped together hard enough or held long enough to do any real damage. The natives weren't fools, though. They got out of there fast. I wished I could have gone with them. There was undoubtedly an unhealthy amount of radiation hanging around. "Now!" I told Bronoski. Charlie and the native were both technically unconscious, but they each had a stranglehold on each other, with Charlie getting the worst of it. Bronoski pried the two of them apart. While he roused Sidney and Elliot from their punch-drunk state, I We knew enough not to use the blood-brothers approach after fifty years test of survival. My men learned to call themselves Last Brother in the usual bragging preliminaries that preceded every encounter. We got pretty good results one, whom they could handle themselves. They still had folk legends Selby and I both dived forward to catch him, but instead of doing the Immediately he jumped to his feet, grinning. "I finally learned to go "Yes, sir. I see I've been fighting this thing too hard. I am an developing a certain amount of doomed self-confidence, but they couldn't be allowed to believe they were infallible Prones. A Prone's off blunders or, as in this case, conviction that he never got himself "I can take care of myself, sir!" ordinary spaceman, sir." can only become a ward of the Galaxy." I studied his face a moment. "We had to blast off without an Assistant j.g. I suppose it's those reports about the eventual fatalities due to radiation leak back there where they are stationed." Baxter looked back at me steadily. "There are a lot of rumors about the "I had something more modest in mind, sir. Like being a captain." He surely must have known how I lived in comparison to him, so I didn't bother to remind him. I said, "Have you ever seen a case of radiation poisoning?" Baxter's jaw thrust forward. "It must be pretty bad—but it isn't as violent as being eaten by floating fungi or being swallowed in an earthquake on some airless satellite."

<question>:
How did the captain stop the alien attack?

<options>:
A With an attack from the guards
B With a child's game
C With a gunshot
D With a nuclear weapon

<answer>:

B