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

<passage>:
Then we can catch the next ship for Earth." "Go back? The planet itself was tough enough—barren, desolate, forbidding enough to stop the most adventurous and Go back? "I never bothered to find Death to all Terrans! in for twenty hours, and then we're going back out there to finish that search-pattern. Earth needs uranium, honey, die out here on Mars is to and I know you'd never be keep moving," I told Val. "The surest way to happy quitting in the middle parched skeletons of Earthmen. Bits of cloth and plastic, And she probably thought the failure of the sandcat was against the redness of the sands. They were the dried, once oxymasks and suits, still gleaming towers and flying roadways. We had profited by at the Dome was at fault—whoever it was who had failed to fasten down the engine Extensive research did not uncover any evidence that the U.S. hood. Nothing but what had stopped us stop a sandcat: sand in the delicate mechanism of the atomic engine. But no it can give as well. Soon after you left they developed genius who had a motto: of the Martian desert. We'd she blamed it all on you," he said blandly. "I intend to wipe every last one of there isn't any uranium in you out, one by one." this sector at all. I think It was an atomic world. we're crazy to keep on searching Ron?" Val pleaded. "Maybe things, virtually robot at the time of the atomic legs. All the survivors of UranCo chief had assured me "I'm quite sane, believe me. But I'm determined to drive desolate wastes of the Martian Mars. Eventually I'll scare you all away." "Just pick us off in the desert?" the Geigs—and UranCo—off well fortified. I've devoted and clumsily enfolded hers. "Come on, kid. Remember—we're doing this for Earth. limbs free of charge. All We're heroes." Mars." "What are you going to do by a shining new world of "Kill you," he told her. "Not oxymask to make things a for their constant undercurrent of meaningless noises. Even though the Martian gravity was only a fraction of Earth's, I was starting to on the infinitely safer desert. You're on Mars hunting uranium, right? To mine and ship the radioactives back to Earth to keep the atomic engines going. Right?" I nodded over at our geiger counters. Mars," Val said irrelevantly. much inflamed by the idea of coming to Mars to help in the search for uranium as I was. doing. She had been just as keep the industries of radioactives-starved Earth going. And we'd always had a roving to come to Mars—the more, sterilizing forty miles barren terrain. The geiger "I was fairly well shielded that meant we had found pay-dirt. dose of radiation instead. Not "Just enough to necessitate to lie down on the soft, spongy Martian sand and "But why kill us Geigs? Mars, until I recalled that I the explosion and the amputation, the ground. "What'samatter, "Because if you'd stayed Mars, lost myself, built this Dome, and swore to get even. There's not a great deal of uranium on this planet, but enough to keep me in a style to which, unfortunately, I'm Mars after all. But, I reminded happy, useful on Earth, instead But there wasn't forty or of being holed up here but I squelched it: on red blood corpuscles." home on Earth. It wasn't But I'll pay it all back," he said. He plunged it seemed hard to believe that we'd exchanged Earth and all it held for us for the raw, untamed struggle that was Mars. But I knew I'd do it again, if about his threat to wipe out channel everything out as revenge." I had the chance. It's because "I still don't believe it—those can succeed?" I taunted him. "Really think you can kill every Earthman on Mars? Of Earth that couldn't be broken without much difficulty. So "Yes! I'll get even with we volunteered. meddled with the atom in the it tinkle against the oxymask. "You've conceived an impossible than the auto-wiper could to turn you loose outside, about as easy to get out of as a spider's web is for a trapped fly. It wasn't Martians that had done it. There weren't any Martians, hadn't been for Earthman who had bound us. a hole through the Dome roof. The automatic sealers on sparsely-settled Mars. to. But how?" which he had entrapped us, "You'll find out soon side to MELT, and shot a stream of watery fluid over our legs, keeping the blaster "I suppose you'll kill me going to kill you at all. I'm going to see to it that you're sent back to Earth." " me—" "Not so loud," I broke in. "They'll help you on Earth. They'll take all the hatred and sickness out of you, and turn with a blaster, even if the "I hate Earthmen," he spat that you couldn't bear to hang around on Earth for as much as a year after the Sadlerville off for Mars without a moment's hated Earth so much you ever left Earth. The answer to that came to me quick enough: we had to. Earth needed radioactives, and the only way to get them was to get out and look. The great atomic wars of the late 20th Century had used up much of the supply, but the amount used to blow up half the great cities of the world some of your pension money to buy yourself a pair of prosthetic legs, and then you "You left Earth too quickly," In three centuries the shattered rebuilt. The wreckage of New York and Shanghai world had been completely "The atom can take away, but and London and all the other ruined cities had been hidden atomic-powered prosthetics—amazing They had used their atomics to make bombs. We used ours for fuel. given the necessary replacement Everything: power drills, printing presses, typewriters, can openers, ocean liners, powered by the inexhaustible energy of the dividing atom. But though the energy is inexhaustible, the supply of nuclei isn't. After three centuries of heavy consumption, the supply failed. The mighty machine that was Earth's industry had started to slow down. blaster-point. But then I remembered of events that led Val and me to end up as a madman's prisoners, on Mars. With every source of uranium mined dry on Earth, we had tried other possibilities. All sorts of schemes came forth. Project Sea-Dredge was trying to get uranium from the oceans. In forty or fifty years, they'd get some results, we hoped. Earth. But you decided to fifty years' worth of raw stuff to tide us over until then. In a decade or so, our power would be just about gone. I could long enough, you'd have used world we'd revert back to. Millions of starving, freezing humans tooth-and-clawing in it in the useless shell of a great atomic civilization. So, Mars. There's not much uranium on Mars, and it's not easy to find or any cinch to how I managed to break the helps. It's a stopgap effort, just to keep things moving until Project Sea-Dredge starts functioning. Enter the Geig Corps: volunteers mine. But what little is there, Mars, combing for its uranium deposits. And here we are, I thought. two hummocks on the settlement where all of UranCo's Dome, of all things! electrocuted you, but there'll and unscrewed the ancient spacesuit fishbowl. even with prosthetic legs, because my chromium legs and atomic-powered

<question>:
How will finding uranium on Mars aid the problem on Earth?

<options>:
A In combination with the underwater project, it will give Earth at least 300 more years of fuel
B It will cause more problems, because neighboring countries will fight over the small amount of fuel
C It will render the underwater project unnecessary
D It can hopefully sustain Earth's industries until the underwater project yields results

<answer>:

D