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

<passage>:
I admit it: I didn't know if I was coming or going—but I know that if I stuck to the old Which are you? important as parchment, "tonight Man will reach the Moon. The golden Moon and the silver ship, symbols of greed. Tonight is the night when this is to happen." "Tonight," Doc was saying in his old voice that was as crackled and " "Sure," the man agreed severely, prying a little worriedly at Doc's but I felt they were the strongest in the world. If a half dozen winos in Seattle hadn't helped me get them loose, Doc and I would have been in a certain ancient metaphysical order and started supplying members The human nodded, Adam's apple jerking in the angry neon twilight. with certain books. Can you imagine the effect of the doors down. I hoped we would make it. I didn't know what would happen or the Necronomican if we didn't. Doc was liable to say something that might nova Sol, for all I knew. back into time and created them. And that unconscious mind, deeper than psychology terms the subconscious, has always known about the powers . They weren't men aliens of ESP, telepathy, telekinesis, precognition. Through these books, the inhabited universe, but reason finally prevailed. He had reached a state of pure thought." "The North American government flophouse doors. has to have this secret, Kevin," the The tubercular clerk looked up from the gaudy comics sections of one of those little tabloids that have the funnies a week in advance. Miss Casey did her duty and tried to stop me with a judo hold, but I ad vance." Miss Casey leaned against my dirty chest and cried into it. I didn't it because I didn't want the human race to become a thing of pure reason without purpose, I knew I was going to need that nickel. Desperately. "Give me a nickel," I said. "What nickel?" His eyes were big, but they kept looking right at me. confident. Maybe I had destroyed the time machine because a world without material needs would not grow and roast coffee. and that did to shield it some from the glare of the light bulb. I swept off all the bedbugs in sight and stepped on them heavily. Then I dropped down into the painted stool chair and let my burning eyes rest on the obscene wall drawings just to focus them. I was so my mind and my eyes through the electric flashes of agony, so I concentrated on Doc's voice and trusted my hands would follow their habit pattern and construct the symbols for his words. They were suddenly distinguishable. " Outsider ... ... Seven ... ... Beyond Six, Seven, Eight ... ... Jimmy Christopher ... ... Oh, are ... see ...." The pen slid across the scribbled face of the notebook and both dropped screaming tenor. I had to get out and get some. But I didn't have a nickel. Still, I had to get some. I crawled to the door and raised myself by the knob, slick with greasy Doc was twisting on the cot, tears washing white streaks across his He shut up at last and I laid him down again and put his arm back across his face. (You can't turn the light off and on in places like that. The old wiring will blow the bulb half the time.) I don't remember how I got out onto the street. She was pink and clean and her platinum hair was pulled straight back, drawing her cheek-bones tighter, straightening her wide, appealing mouth, drawing her lean, athletic, feminine body erect. She was wearing upper half of her legs. The most wonderful thing about her was her perfume. Then I realized it I cringed and whined. She would expect it of me. I suddenly realized I felt my face flushing red. "You wouldn't want to be seen with a bum pale, grayish brown and steaming faintly. I picked it up in both hands to feel its warmth. Not abnormally stimulated, but strong, alert, poised on the brink of exhilaration. That was what coffee did for me. I was a caffeine addict. Earth-norm humans sometimes have the addiction to a slight extent, but with a few drops left in them. They have a little caffeine in them—not enough, never enough, but better than nothing. hour for the rest of my life. The hamburger was engulfed by five black-crowned, broken fingernails and raised to two rows of yellow ivory. I surrounded it like an ameba, almost in a single movement of my jaws. She smiled. I caught that out of the edge of my vision, but mostly I "It's Miss Casey—Vivian Casey," she corrected. She was a of course . Everybody has a name, and I knew if I went off somewhere quiet and thought about it, mine would come to me. Meanwhile, I would tell the girl that my name was ... Kevin O'Malley. Abruptly I realized that that "Happy to, miss," I mumbled. She pushed a white rectangle in front of me on the painted maroon bar. : Please send me FREE of obligation, in sealed wrapper, "The Scarlet Book" revealing to me how I may gain Secret Mastery of the Universe. Name : ........................ and Miss Vivian Casey was out of sight and scent. "She didn't," he stammered. "Why do you think I was trying to get that bar, smoothing it. I scooped up my change and walked out the door. There was no one on the sidewalk, only in the doorways. First I opened the door on an amber world, then an azure one. Neon light was coming from the chickenwire border of the room, from a window somewhere beyond. The wino on one side of the room was singing and the one on the other side was praying, same as before. Only they had changed around—prayer came from the left, song from the right. start. He had broken the light bulb and used the filament and screw bottom. His strong hands had unraveled some of the bed "springs"—metal before dismantling it, to write something. I tilted the notebook against the neon light, now red wine, now fresh grape. I read it. and time from which he comes." The surprise stung. "How did you know?" I asked. He gestured with a pale hand. "To maintain a logical approach, I must reject the supernatural. Your arrival, unless hallucinatory—and I knew who these two men were, with a tormenting doubt. "But the other—" ever heard theorized from Hindu yoga through Extra-sensory Perception to Relativity and the positron and negatron. "Interesting." He breathed out suffocating black clouds of smoke. "Presume that the people of your time by their 'Extra-sensory Perception' have altered the past to make it as they suppose it to be. the goddesses of love that people imagined or the scrawny, big-nosed redhead and fading old woman of scholarship. Then I noticed the unknown sort to me. His tapered fingertips had indented the metal. His bright eyes followed mine and he smiled faintly. "Withdrawal symptoms." The admiration and affection for this man that had been slowly building up behind my hatred unbrinked. I remembered now that he had stopped. He was not really a snowbird. ... into the effective range of Miss Casey's tiny gun. I watched her face flash blue, red, blue and knew she meant it. But I "It takes money—money Doc didn't have—to make money," Miss Casey I turned toward her and threw the rest of the coffee into her face. The coffee splashed out over her platinum hair and powder-blue dress that looked white when the neon was azure, purple when it was amber. The coffee stained and soiled and ruined, and I was fiercely glad, unreasonably happy. "They always do," I told him. "They ceased to exist—as human beings—shortly after they received a "But, Kevin," Andre said, "you aren't that dirty."

<question>:
Why does Miss Casey's face flash red?

<options>:
A Because she is ready to kill Kevin.
B Because she is  human.
C Because she is furious.
D Because of the neon lights.

<answer>:

D