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

<passage>:
turn Ledman over to the authorities. Then we can catch the next ship for Earth." "I never bothered to find out their names," Ledman "What others?" other Geigs I caught unawares, have left—Geig-hunting. Look out there." He gestured through the translucent skin of the Dome, and I felt sick. There was a Earth needs uranium, honey, and I know you'd never be oxymask to make things a happy quitting in the middle tell-tale clicks." once oxymasks and suits, still clung to them. it off as occupational hazards. It was beyond her to see that some grease monkey back at the Dome was at fault—whoever it was who had failed to fasten down the engine mechanism of the atomic engine. Geigs?" I asked. " Why? "Because I hate wars. "No," Ledman said evenly. "I'm quite sane, believe me. But I'm determined to drive the Geigs—and UranCo—off there's no sense in you all away." "Just pick us off in the desert?" "Exactly," replied Ledman. of the Dome, ahead nothing but the mazes and gullies of well fortified. I've devoted years to building it. And I'm back against those hills. They couldn't pry me out." He let doing this for Earth. "Come on, kid. Remember—we're We're heroes." his pale hand run up into his gnarled hair. "I've devoted the geigers had been obstinately for their constant undercurrent Earth's, I was starting to tire, and I knew it must have suckers! Why did I ever let you volunteer for the Geig Corps and drag me along?" right? To mine and Earth to keep the atomic engines ship the radioactives back to I nodded over at our geiger going. Right?" counters. Ledman said acidly. "How sad. I could almost feel sorry coming to Mars to help in the for you. Almost." "Just what is it you're obligation, something we keep the industries of radioactives-starved Earth going. represented Ledman Atomics. I was there to sign a new contract for my company. barren terrain. The geiger "Just enough to necessitate "But why kill us Geigs? of turning the weary, bedraggled my fellow-members on the board of Ledman Atomics the Geigs. pauper!" Then he snapped the punchline at me. "They renamed Ledman Atomics. Who did you say you worked for?" "Don't bother. A more inventive for years then I came to Mars, lost myself, built this Dome, and swore to get even. There's not a great deal of uranium on this planet, but the job. "That's another little souvenir Others. The Blast turned me into a walking pin-cushion. But I'll pay it all the entire Geig Corps, since wanted to keep them. Which much as the whole concept, so The Geig Corps preferred all the insane, cockeyed—" Val's quick, worried head-shake cut me off. But Ledman had felt my words, all right. "Yes! I'll get even with every one of you for taking married couples, working in "Easy, baby," I said. I knew what our ace in the hole was. But I had to get Ledman within reach of me first. to turn you loose outside, a spider's web is for a trapped breathe!" She began to yell, writhing in her bonds. That did it. Ledman hadn't much humanity left in him, but there was a little. He lowered Earthman who had bound us. fish. It had been spun on over. The blaster went off, burning a hole through the Dome roof. The automatic sealers glued-in instantly. Ledman went sprawling helplessly out into the middle of the floor, wore an outmoded, bulky spacesuit and a fishbowl helmet, all but the face area weren't attached to his opaque. The oxygen cannisters the customary skin-tight pliable I rolled over and covered it with my body. Ledman clawed his way to me with tremendous effort and tried wildly to pry the back as expected, though. They were strapped to the Dome and lay there. Val rolled over to me. "Now if I could get free of and a very efficient-looking "Teamwork," Val said. She I looked uneasily at Ledman. He was groaning and our legs, keeping the blaster to reach out and grasp the blaster. Then I pulled myself across the floor to Ledman, removed the tanglegun, and melted the remaining tangle-cord my "And I have no fears of an armed attack. This place is oxysuits. legs." waving the tanglegun to indicate the chair and the two exhaust ducts behind the wheel-housings Val got him into his suit, and "They'll help you on Earth. They'll take all the hatred and brought him the fishbowl helmet. "I hate Earthmen," he spat I've never seen this guy before, and I thought I knew everyone at the Dome." "Quiet up there!" our captor called, and we stopped that you couldn't bear to hang around on Earth for as much "Why are you telling all and the prosthetics men, "Because if you'd stayed long enough, you'd have used some of your pension money Earth needed radioactives, to buy yourself a pair of prosthetic legs, and then you Ledman scowled, and then his face went belligerent again. "They told me I was 20th Century had used up much of the supply, but the amount used to blow up half the great cities of the world and the only way to get them by a shining new world of gleaming towers and flying roadways. We had profited by above us. He wasn't wearing for fuel. given the necessary replacement limbs free of charge. All Everything: power drills, oxysuits we had. He powered by the inexhaustible energy of the dividing atom. But though the energy is inexhaustible, the supply of of heavy consumption, the supply failed. The mighty sorry for him, a pathetic legless figure propped up against the wall of the Dome at blaster-point. But then I remembered machine that was Earth's industry Geigs—or more—and would on Mars. With every source of uranium mined dry to end up as a madman's prisoners, Ledman," I said. "All this time you could have been happy, useful on Earth, instead he'd killed twelve to tide us over until then. In a of hate starting to topple, helps. It's a stopgap effort, over?" just to keep things moving Enter the Geig Corps: volunteers deposits. And here we are, I thought. After we walked on a while, a Dome became visible up ahead. It slid up over the crest of a hill, set back between two hummocks on the purr of their motors was the enough to escape observation. For a puzzled moment I thought it was our Dome, the settlement where all of UranCo's Geig Corps were located, Ledman was sobbing. "Okay, Ledman," I said. us and fairly small. A one-man Dome, of all things! "Welcome to my home," he said. "The name is Gregory Ledman." He herded us off to one side of the airlock, uttered this was actually quite near sentenced to psych adjustment. When they're finished, Gregory Ledman the killer a few words keyed to his will be as dead as if they'd Ledman." I turned to Val. "Got the geigers, honey?" electrocuted you, but there'll who hated. For the first time since muscles. No wonder how unfair I had been. She lifted the geiger harnesses, and I put Ledman back in his wheelchair. Val slipped her oxymask back on and fastened it shut. "Let's get back to the Dome in a hurry," I said. "We'll

<question>:
Why is the Geig Corps important?

<options>:
A Val and Ron worked for them before signing up with UranCo
B It is UranCo's method of acquiring manpower for the resource search
C It is how Ledman got involved in the uranium project in the first place
D They funded the dome that Ledman lives in

<answer>:

B