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 planet itself was tough enough—barren, desolate, forbidding enough to stop the most adventurous and dedicated. But they had to run head-on against a mad genius who had a motto: like you, out on the little heap of bones lying there, looking oddly bright parched skeletons of Earthmen. Bits of cloth and plastic, once oxymasks and suits, still tell-tale clicks." I gave a joyful whoop and clung to them. about the best wife a guy could ask for, but when she hero," she said. wants to be she can be a real flying bother. in an agony of fatigue. And she probably thought it was who had failed to fasten down the engine hood. Nothing but what had stopped us could But we'd vowed it wouldn't happen to us. It had. you?" "Because I hate Ron?" Val pleaded. "Maybe I thought all his kind had died at the time of the atomic wars. way, but changed my mind. madman!" When Val's tired and overwrought "I'm quite sane, believe me. But I'm determined to drive the Geigs—and UranCo—off Mars. Eventually I'll scare you all away." I heard Val sob, "He's a but the mazes and gullies of this dead world. He was a cripple in a wheelchair—helpless as a rattlesnake. "Exactly," replied Ledman. "And I have no fears of an and clumsily enfolded hers. "Come on, kid. Remember—we're We're heroes." your husband. I want him as rocked back and forth in his wheelchair, toying with the gleaming, deadly blaster in his hand. a nightmare—sitting there, placidly rocking back and forth, a nightmare. I found myself fervently her lovely but unrugged legs. "Heroes," she said bitterly. "We're not heroes—we're unless she was so exhausted she didn't know what she was "Ah—two young heroes," Ledman said acidly. "How sad. I could almost feel sorry "Just what is it you're "Atomics cost me my legs," he said. "You remember the Sadlerville Blast?" he asked. "Of course." And I did, too. I'd never forget it. No one would. How could I forget that great accident—killing hundreds, injuring thousands turning against me. I tried to jolly her. "Buck up, kid," I said. I didn't dare You know who I am, now?" kept up a fairly steady click-pattern, but never broke into that sudden explosive tumult enough to kill me," he said. "Just enough to necessitate I started to feel tired myself, terribly tired. I longed up with the idea before I did. I wished there was some way of turning the weary, bedraggled decided that a semi-basket case like myself was a poor the Geigs. Twelve steps later, I decided Ron?" Val asked sleepily. "Don't bother. A more inventive title than Ledman Atomics, but not quite as much heart, wouldn't you say?" He grinned. "I saved for years Poor kid , I thought. Maybe enough to keep me in a style to which, unfortunately, I'm no longer accustomed." He consulted his wrist just to make doubly certain. "That's another little souvenir of Sadlerville. I'm short sleeping form, and thought of our warm, comfortable little home on Earth. It wasn't Others. The Blast turned me into a walking pin-cushion. But I'll pay it all down over one eyebrow, and it seemed hard to believe that we'd exchanged Earth and all too nightmarish to be real. I wasn't seriously worried about his threat to wipe out the entire Geig Corps, since it was unlikely that one man her soft blonde hair trailing all off. No, it wasn't the threat that disturbed me, so much as the whole concept, so strange to me, that the human mind could be as warped and twisted as Ledman's. had felt my words, all right. Earth that couldn't be broken without much difficulty. So "Yes! I'll get even with every one of you for taking first place, I'd be as tall and powerful as you, today—instead of a useless cripple in a wheelchair." Heroes. "You've conceived an impossible scheme of revenge and tired too, tired from our wearying journey across the empty desert. now you're taking it out on His eyes blazed. "Who are But she was tired. And I was for, Ron?" bound in thin, tough, plastic tangle-cord, swathed from chin to boot-bottoms, my arms imprisoned, my feet caught. And tangle-cord is about as easy to get out of as a million years. It was some Earthman who had bound us. I rolled my eyes toward much humanity left in him, but there was a little. He lowered moan most horribly. It almost convinced me. I saw Val's pale, frightened face turn to "Ron—" leg up hard, tearing the tangle-cord with a snicking rasp, "A very wise statement," said a brittle, harsh voice the customary skin-tight pliable oxysuits we had. He wore an outmoded, bulky glued-in instantly. Ledman went sprawling helplessly out into the middle of the floor, spacesuit and a fishbowl helmet, all but the face area Through the fishbowl I could see hard little eyes, a yellowed, parchment-like face, a grim-set jaw. I didn't recognize him, and this struck me a bit, reached out with my free leg, and booted him across the floor. He fetched which he had entrapped us, and a very efficient-looking with my heavy, clumsy boot. I tried again, and this time it snapped open. I got the tip That was when I realized he are you?" mind. She began to nibble the vile-tasting tangle-cord, running her teeth up and down it until it started to give. She I told him. "I'm not man pointing it is in a wheelchair. "What's going on, Ron?" "You're just all full of hardly compared with the amount we needed to put them back together again. In three centuries the shattered world had been completely rebuilt. The wreckage "She's right," I told him. "The atom can take away, but it can give as well. Soon after the Sadlerville Blast were given the necessary replacement 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 for a moment I almost felt sorry for him, a pathetic legless I saw him wilt visibly, and blaster-point. But then I remembered he'd killed twelve Geigs—or more—and would figure propped up against "You're a very sick man, humans tooth-and-clawing in it in the useless shell of and I decided to give it the final push. "Haven't you wondered how I managed to break the a great atomic civilization. over?" "Yes—human legs aren't strong enough to break tangle-cord that way." mine. But what little is there, helps. It's a stopgap effort, peacefully, a wayward lock of my smooth, gleaming metal legs. The almost soundless purr of their motors was the but another look told me that this was actually quite near us and fairly small. A one-man Dome, of all things! clumsily holding the blaster, and unscrewed the ancient spacesuit fishbowl. His face was a bitter, dried-up mask. He was a man who hated. electrocuted you, but there'll be a new—and sane—Gregory now that I had been driving her mercilessly—me, with my chromium legs and atomic-powered muscles. No wonder she was ready to fold! The place was spartanly

<question>:
What kind of person is Ron?

<options>:
A A curious and determined man who does his best
B An impulsive man who does not pay attention to others' needs
C A doting husband who follows his wife to Mars
D An adventuresome soul but still a timid one

<answer>:

A