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 CONJURER of VENUS By CONAN T. TROY A world-famed Earth scientist had disappeared on Venus. When Johnson found him, he found too the secret to that globe-shaking mystery—the fabulous Room of The Dreaming. Johnson got rain in his eyes, his nose, and his ears. That was the way occasions when Johnson had thought the rain was falling straight up. Otherwise, how had the insides of his pants gotten wet? On Venus, everything came at you from all directions, it seemed to Johnson. Opening the door of the joint, it was noise instead of rain that came at him, the wild frantic beat of a Venusian rhumba, the perceptible emotional nuances of hate, love, fear, and rage. But mostly love. Since this place had been designed to excite the senses of both humans and Venusians, the love feelings were heavily tinged with straight sex. He sniffed at them, feeling them somewhere inside of him, aware of them but aware also that here was apprehension, and plain fear. "Is the mighty human wanting liquor, a woman or dreams?" His voice was all soft syllables of liquid sound. The Venusian equivalent of a headwaiter was bowing to him. one?" As he was speaking, the headwaiter was deftly conducting Johnson smiled up at him unafraid. Didn't she know there were men present here in this space port city who would snatch her bodily from the bar stool and carry her away for sleeping purposes? And Venusians were here who would cut her pretty throat for the sake of the necklace that circled it? "Growing." The blue eyes were unafraid. Sombrely, Johnson regarded her. What was she doing here? Was she in the employ of the Venusians? If she was being planted on him, then his purpose here was suspected. He shrugged the thought aside. If his purpose here was suspected, there would be no point in planting a woman on him. There would only be the minor matter of slipping a knife into his back. In this city, as on all of Venus, humans died easily. No one questioned the motives of the killer. "Um," Johnson said, his eyes on Vee Vee. "How—" were blended, but one aroma was prominent among them, the sweet, cloying, soul-stirring perfume of the Dreamer. In the suddenly hushed place little sounds began to appear as Venusians and humans began to shift their feet and their bodies in anticipation of what was to happen. Vee Vee, her hand on Johnson's elbow, rose. Johnson stood up with "What way?" Her eyes sparkled. "Eve's way," she answered. "Um!" Surprise sounded in his grunt. "But apples don't grow on Venus." "Eve's daughters don't use apples any more, darling. Come along." signs. Johnson ignored them. With Vee Vee's fingers lightly patting his throbbing of the lutes was louder. It was Venusian music the lutes were playing. Human ears found it inharmonious at first, but as they became accustomed to it, they began to detect rhythms and melodies that human "What is it?" "How would I know?" "Please!" Her voice grew sharp. "I think Johnny Johnson ought to know." "Johnny! How do you know my name?" "Shouldn't I recognize one of Earth's foremost scientists, even if he is incognito on Venus?" Her voice had a teasing quality in it. "But—" "And who besides Johnny Johnson would recognize the Karmer nerve grip and be able to break it instantly?" "Hell—" "John Michael Johnson, known as Johnny to his friends, Earth's foremost expert in the field of electro-magnetic radiations within the human body!" Her words were needles of icy fact, each one jabbing deeper and "And how would I make certain you were Johnny Johnson, except by seeing "Please, darling, you are making a scene. I am sure this is the last thing you really want to do." He looked quickly around them. The Venusians and humans moving into this room seemed to be paying no attention to him. His gaze came back to her. balance. Didn't she know that this was true? And as for Martin—But Caldwell had said that she had been asking about Martin. What connection did she have with that frantic human genius he sought here? Johnson felt his skin crawl. He moved toward a nest of cushions on a ramp, found a Venusian was beating him to them, deftly changed to operation but they knocked out a human or a Venusian in a matter of seconds. True, the person they knocked unconscious would be all right the next Johnson felt his chest muscles contract, then relax. Vee Vee's fingers Johnson had not seen Unger appear. One second the circle of light had been empty, the next second the Venusian, smiling with all the impassivity of a bland Buddha, was in the light. He weighed three hundred pounds if he weighed an ounce, he was clad in a long robe Vee Vee's fingers dug deeper into Johnson's arm. "How—" "Shhh. Nobody knows." No human knew the answer to that trick. Unless perhaps Martin— lay motionless. Johnson found himself with the tendency to hold his was not prepared to disagree. Around him, he saw that the Venusians were already going ... going ... going.... Some of them were already gone. This was an old experience to them. They went rapidly. Humans went more slowly. The Venusian watchers had relaxed. They looked as if they were asleep, perhaps in a hypnotic trance, lulled into this state by the music and the perfume, and by something else. It was this something else that sent Johnson's thoughts pounding. The Venusians were like opium smokers. But he was not smoking opium. He was not in a hypnotic trance. He was wide awake and very much alert. He was ... Back when he had been a kid he had dreamed of flight to the far-off stars. He had made models of space ships. In a way, they had shaped his destiny, had made him what he was. They had brought him where he was this night, to the Dream Room of a Venusian tavern. Venusians were quiet. The music had shifted. A slow languorous beat of hidden drums filled the room. There was another sound present, a high-speed whirring. It was, somehow, a familiar sound, but Johnson had Venus to see. This ... this...." The first voice went into silence. Another voice took its place. "This is another damned vision!" the second voice said. "This ... this is something that is not real, that is not possible! No Venusian Dreamer, and no one else, can levitate, can defy the laws of gravity, can float upward toward the ceiling. Your damned eyes are tricking you!" "We are not tricking you!" the eyes hotly insisted. "It is happening. We are seeing it. We are reporting accurately to you. That Venusian Buddha is levitating. We, your eyes, do not lie to you!" "You lied about the space ship!" the second voice said. Venusian being jarred out of his dream. "Damn it!" A human voice said. A wave as sharp as the tip of a sword swept through the room. On Johnson's right, Vee Vee seemed to flow to life. Her arms came up Venusians were attacking a man. "It's Martin!" Caldwell shouted. "He is In Johnson's hand as he came to his feet the zit gun throbbed. He fired blindly at the mass of Venusians. Caldwell was firing too. The soft throb of the guns was not audible above the uproar from the crowd. Struck by the gas-driven corvel charges, Venusians were falling. But there seemed to be an endless number of them. "Vee Vee?" Johnson suddenly realized that she had disappeared. She had "Vee Vee!" Johnson's voice became a shout.

<question>:
What did Johnson do that ended up proving himself to Vee Vee?

<options>:
A He knew how to defend himself from her
B He knew what he was getting into with the entertainment
C He knew the ins and outs of the club
D He knew facts about Venus that few humans do

<answer>:

A