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

<passage>:
THE Then we can catch the next ship for Earth." "Go back? Go back? The planet itself was tough enough—barren, desolate, forbidding enough to stop the most adventurous and genius who had a motto: Death to all Terrans! "Let's keep moving," I told Val. "The surest way to die out here on Mars is to give up." I reached over and turned up the pressure on her finish that search-pattern. Earth needs uranium, honey, we're going back out there to and I know you'd never be happy quitting in the middle By ROBERT SILVERBERG the failure of the sandcat was it was who had failed names now. None of them Extensive research did not uncover any evidence that the U.S. dedicated. But they had to run head-on against a mad mechanism of the atomic engine. Why? me somehow: So we were out walking on the spongy sand of the Martian desert. We'd been walking a good eight hours. prosthetics—amazing to wipe every last one of you out, one by one." there isn't any uranium in "We volunteered to come to ruined cities had been hidden "Because I hate at the time of the atomic wars. HEROES arguing with her. I stared ahead at the bleak, desolate wastes of the Martian Mars. Eventually I'll scare you all away." "Just pick us off in the desert?" "Exactly," replied Ledman. "And I have no fears of an but we had felt it a sort of given the necessary replacement armed attack. This place is well fortified. I've devoted "Come on, kid. Remember—we're doing this for Earth. We're heroes." She glared at me. "Heroes, since I landed here on Mars." "What are you going to do with us?" Val finally asked, keep the industries of radioactives-starved limbs free of charge. All for their constant undercurrent of meaningless noises. Even though the Martian gravity was only a fraction of Earth's, I was starting to tire, and I knew it must have "Heroes," she said bitterly. snapped. "Well, let me show you. 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 "We're not heroes—we're counters. doing. She had been just as much inflamed by the idea of coming to Mars to help in the search for uranium as I was. We knew the pay was poor, Mars," Val said irrelevantly. "Ah—two young heroes," "Atomics cost me my legs," Ledman said acidly. "How Earth going. And we'd always had a roving foot, both of us. No, we had decided together to come to Mars—the way we decided together on everything. Now she was that great accident—killing hundreds, injuring thousands that sudden explosive tumult dose of radiation instead. Not myself, terribly tired. I longed to lie down on the soft, spongy Martian sand and bury myself. the removal of—" he indicated "Just enough to necessitate Mars, until I recalled that I hadn't. In fact, she had come up with the idea before I did. had nothing to do with it." the explosion and the amputation, Atomics. Who did you say you worked for?" I began, "Uran—" "Don't bother. A more inventive title than Ledman Atomics, but not quite as Mars, lost myself, built this Dome, and swore to get even. There's not a great deal of uranium on this planet, but Mars after all. But, I reminded myself, someone home on Earth. It wasn't much, but people in love don't too. Adrenalin, insulin. Others. The Blast turned need very fancy surroundings. 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 I had the chance. It's because about his threat to wipe out wasn't seriously worried all off. No, it wasn't the wanted to keep them. Which she blamed it all on can succeed?" I taunted him. "Really think you can kill every Earthman on Mars? Of all the insane, cockeyed—" Val's quick, worried head-shake Earth that couldn't be broken without much difficulty. So we volunteered. meddled with the atom in the The wind blasted a mass of scheme of revenge and Get sick! 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 a million years. It was some Earthman who had bound us. I rolled my eyes toward The blaster went off, burning wore an outmoded, bulky in the air. The blaster weren't attached to his impact of landing and spun flew from his hands at the him, and this struck me odd. I thought I knew everyone on sparsely-settled Mars. Somehow I'd missed him. What shocked me most was blaster. Then I pulled myself removed the tanglegun, and oxysuits. going to kill you at all. I'm going to see to it that you're sent back to Earth." " No! outboard atomic rigging behind don't want to face them again—not 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 "I hate Earthmen," he spat out. "I hate all of them." that you couldn't bear to hang around on Earth for as much as a year after the Sadlerville Blast. You had to take right off for Mars without a moment's delay, didn't you? You hated Earth so much you had to leave." where we were going, and why. I wondered why we had 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 hardly compared with the I had no muscles to fit them to." "You left Earth too quickly," world had been completely Val said. "It was the only way," he In three centuries the shattered "The atom can take away, but it can give as well. Soon after you left they developed atomic-powered our grandparents' mistakes. They had used their atomics to make bombs. We used ours for fuel. It was an atomic world. 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 channel everything out as revenge." "I still don't believe it—those world we'd revert back 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 mine. But what little is there, of hate starting to topple, Mars, combing for its uranium deposits. And here we are, I thought. purr of their motors was the let's go. Between the psychs and the prosthetics men, "But I'm a murderer!" That I'd never walk again, my chromium legs and atomic-powered

<question>:
Which of these was not a consequence of the Great Atomic Wars?

<options>:
A Limited resources ran out over time
B Multiple planets were settled by various countries in a display of power
C All major types of power sources changed
D Earth decided to run supply missions to Mars

<answer>:

B