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

<passage>:
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. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Otherwise, how had the insides of his pants gotten wet? notes pounding and jumping through the smoke and perfume clouded room. Feeling states came at him, intangible, but to his trained senses, perceptible emotional nuances of hate, love, fear, and rage. But mostly love. Since this place had been designed to excite the senses of both "Is the mighty human wanting liquor, a woman or dreams?" His voice tonight?" in a gesture indicating ecstasy. "It is my great regret that I must do one?" As he was speaking, the headwaiter was deftly conducting Johnson "But certainly." The headwaiter was gone into the throng. Johnson was itself. Women such as this one had been quickening the pulse of men since the days of Adam. The second reason concerned her presence here in this here who would cut her pretty throat for the sake of the necklace that circled it? "They are "How did you know? I mean...." "Are you sufficiently knowing to be here?" "I am not a child," she answered with a firm sureness that left no 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. "You have decided them?" "Every last one of them?" "Oh, there might be one or two matters undecided somewhere, say out on the periphery of the galaxy. But we will solve them when we get to them." He waved vaguely toward the roof and the sky of space hidden bowing and scraping in front of him. "The great one has decided, yes?" "Certainly," Johnson said. The decision was made on the spur of the be something else. And "Say, I want to know more—" Johnson began. His words were drowned in were blended, but one aroma was prominent among them, the sweet, of what was to happen. her. He got the surprise of his life as her fingers clenched, digging into his muscles. Pain shot through his arm, paralyzing it and almost paralyzing him. He knew instantly that she was using the Karmer nerve block paralysis on him. His left hand moved with lightning speed, the tips of his fingers striking savagely against her shoulder. She gasped, her face whitened as pain shot through her in response to elbow lost its grip, dropped away and hung limp at her side. Grabbing it, she began to massage it. "You—you—" Hot anger and shock were in her voice. "You're the first man I ever knew who could break the Karmer nerve paralysis." "But—" interrupt." "There, there, darling, relax," she said. "I know a better way to get you than by using the Karmer grip." "What way?" "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." Moving toward the open door that led to the Room of the Dreaming, II rising up from an open space at the bottom. There ought to have been a stage there at the bottom, but there wasn't. Instead there was an the room was in darkness, a fit hiding place for ghosts or Venusian werewolves. Pillows and a thick rug covered the circling ramps. The soul-quickening Perfume of the Dreamer was stronger here. The minds had not known existed. The room was pleasantly cool but it had coldness now. "What is it?" "How would I know?" "Shouldn't I recognize one of Earth's foremost scientists, even if he "But—" "And who besides Johnny Johnson would recognize the Karmer nerve grip "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 deeper into him. "And how would I make certain you were Johnny Johnson, except by seeing if you could break the Karmer nerve grip? If you could break it, then there was no doubt who you were!" Her words went on and on. "Please, darling, you are making a scene. I am sure this is the last thing you really want to do." A gray color came up inside his soul. "But—but—" His voice was suddenly weak. The fingers on his arm were very gentle. "No harm will come to you. Am I not with you?" "That's what I'm afraid of!" he snapped at her. If he had had a choice, he might have drawn back. But with circumstances as they connection did she have with that frantic human genius he sought here? left. operation but they knocked out a human or a Venusian in a matter of True, the person they knocked unconscious would be all right the next day. For this reason, many people did not regard the zit guns as effective weapons, but Johnson had a fondness for them. The feel of the little weapon inside his coat sent a surge of comfort through him. The music picked up a beat, perfume seemed to flow even more freely through the air, the lights dimmed almost to darkness, a single bright illumination on the mat and the headrest at the bottom of the room. The that would impede movement. He had appeared in the bright beam of the spotlight as if by magic. 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— take on the even, regular rhythm of sleep. Under the circle of light pouring down from the ceiling, the Dreamer sensed a pattern. Perhaps the path to the far-off stars passed this way, through such scented and musical and impossible places as these going.... Some of them were already gone. This was an old experience to them. They went rapidly. Humans went more slowly. watching a space ship float in an endless void . in the range of his vision. It was as if they did not exist. Yet he on the periphery of his universe, perhaps of the universe. All he saw was the space ship. Back when he had been a kid he had dreamed of flight to the far-off this night, to the Dream Room of a Venusian tavern. The vision of the space ship floating in the void entranced and that here and now "The space ship!" with my dream." "Your dream?" sound in the darkened room. Johnson settled down. A glance to his left The vision would not come. He tried again for the space ship. It would not come. Anger came up instead. intruding into his consciousness was stopping the vision. So far as he could tell, he was the only one present who was not III An invisible force seemed to twitch at Johnson's skin, nipping it here "This is another damned vision!" the second voice said. "This ... "We are your adrenals. We are pouring forth adrenalin." "I am your pancreas. I am gearing you for action." The little voices seemed to blend into a single chorus. "Action, "But hurry. We are excited." "There is a time to be excited and a time to hurry. In this situation, if action is taken before the time for it—if that time ever comes—we can all die." "Die?" the chorus quavered. "Yes," Johnson said. "Now be quiet. When the time goes we will all go A wave as sharp as the tip of a sword swept through the room. Unger fell. if some pleasant dream had been interrupted. is there seemed to be an endless number of them. slid out of his sight. "To hell with the woman!" Caldwell grunted. "Martin's the important one." Johnson followed.

<question>:
Of the following options, which technological advancement is NOT a part of this story?

<options>:
A a technique that prevents someone from moving
B dream-based entertainment
C guns that make people pass out for an extended period
D knives containing paralyzing chemicals

<answer>:

D