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

<passage>:
Cavalry it is!" His eyes darted over the machines. "Here. Help me. was to laugh! For Click and Irish were "There's only one stipulation I make, Irish. I want a complete picture weapons a single gun and a news-reel camera. [Transcriber's Note: This etext was produced from actor are you?" "That's a silly question." "You only have to do three things. Walk with your gun out in front of of Marnagan capturing Raider's Base. I want a picture of Gunther's face when you do it. Snap it, now, we've got rush work to do. How good an Extensive research did not uncover any evidence that to it rack-spin film between his fingers, and he knew he was getting a damned sweet picture of everything that was happening. The picture of Marnagan hunched huge over the control-console, wrenching levers, jamming studs with freckled fists. And out in the marooned on the pirate's asteroid—their only metal-link cloth. He glanced up from a paper-file, surprised. Before he "Is this "Impossible!" film, or an audience. Like this one, dammit! Like this from filming it. Everything was too wild, hot and angry. Gunther was camera. Silence came and engulfed all the noise, ate it up and swallowed it. throwing a fit, still seated at his desk, unable to move because of his fragile, bony legs and their atrophied state. of the Patrolmen clutch at their hearts, crumple, lie on the ground and wreckage into that silence. He didn't know what he was doing until he found the camera in his fingers as if it had grown there when he was born. He stood there, thinking "Well, I'll at least have a few good scenes on film. I'll—" twitch. God, what photography! A hunk of metal teetered, fell with a crash. Marnagan elevated seven that pierced through his vac-suit, and silence. He wriggled out of the Interplanetary Patrolman emerges unscathed that film-contraption!" Hathaway felt funny inside, suddenly. "I never thought of that. got it here, on film." Marnagan winced his freckled square of face. "It's not proof we need now, Click. Oxygen. And then you like, Click. It's times like this when we all need words, any words, on our tongues. You got your camera and your scoop. Talk about It's irony clean through. That's probably why he planned the meteor and ?" "Are you telling me? It's man-made. Better than that—it's Gunther! No ?" horrors. Progeny from Frankenstein's ARK. Immense crimson beasts with numerous legs and gnashing mandibles, brown-black creatures, some the creatures at all. they can't get us in here!" Click's voice gasped it out, as Marnagan squeezed his two-hundred-fifty pounds beside him. Instinctively, Hathaway added, "Asteroid monsters! My camera! What a scene!" "Damn your damn camera!" yelled Marnagan. "They might come in!" "Use your gun." didn't know what. Something about these monsters Hathaway petted his camera reluctantly. "What in hell's the use? All this swell film shot. Nobody'll ever see it." "Then," retorted Marnagan, "we'll develop it for our own benefit while said. "I paid your salary to trot along, photographing, we hoped, my capture of Gunther, now the least you can do is record peace negotiations betwixt me and these pixies." for nothing but a covering over the fast, furious thinking running his mind was whirring faster than his camera as he spun a picture of Marnagan standing there with a useless gun pointed at the animals. Montage. Marnagan sitting, chatting at the monsters. Marnagan smiling anything. Nobody fooled nobody with this act. Death was near and they had sweaty faces, dry mouths and frozen guts. When Click finished filming, Irish sat down to save oxygen, and used it he builds an asteroid-base, and drags ships down. Space is lousy over long distances. So what's the best weapon, which tend to them. It all looks like Nature was responsible. See how subtle his attack is? Looks like accidental death instead of murder, if the developed, smiling. It was one of his best inventions. Self-developing film. The first light struck film-surface, destroyed one chemical, leaving imprints impressions. Quick stuff. Inserting the film-tongue into a micro-viewer in the camera's base, Click handed the whole thing over. "Look." Marnagan put the viewer up against the helmet glass, squinted. "Ah, Click. Now, now. This is one lousy film you invented." "Huh?" "It's a strange process'll develop my picture and ignore the asteroid "What!" Hathaway grabbed the camera, gasped, squinted, and gasped again: Pictures in montage Marnagan sitting down, chatting conversationally with nothing nothing pretending to be happy in front of nothing . monsters weren't there, they weren't there. infra-red or something that won't come out on film?" "Yes. Sure. Of course. I guess—" "If you say them animals ain't there, that's all I need. Now, stand aside, you film-developing flea, and let an Irishman settle their bones." He took an unnecessary hitch in trousers that didn't exist except under an inch of porous metal plate. "Your express purpose on this voyage, Hathaway, is taking films to be used by the Patrol later for teaching Junior Patrolmen how to act in tough spots. First-hand education. Poke another spool of film in that contraption and give me Think it hard. There aren't any animals—" animated. "They just plain vanished. They were only imaginative of his set-up. Explorers who land here inadvertently, are chased back that isn't being dangerous—" In that time we've got to trace those monsters to their source, Gunther's Base, fight our way in, and get fresh oxy-cannisters." Click attached his camera to his mid-belt. "Gunther probably thinks we're dead by now. Everyone else's been fooled by his playmates they never Irish. sending station for these telepathic brutes. Come on!" Evidently the telepathic source lay there. They approached it warily. "We'll be taking our chances on guard," hissed Irish. "I'll go ahead, draw their attention, maybe get captured. Then, you show up with gun...." "I haven't got one." "We'll chance it, then. You stick here until I see what's ahead. They probably got scanners out. Let them see me—" audio, kept his receiving on. Marnagan, weaponless. have a weapon. Oh, damn, damn! "Don't move!" he snapped. "I've got a weapon stronger than yours. One posing," he said. "That shot will go down in film history for candid acting." "What!" "Ah: ah! Keep your place. I've got a real gun now. Where's the door leading into the Base?" an asteroid nothing more than a honey-comb fortress sliding through the void unchallenged. cargo. The animals served simply to insure against suspicion and the wanted. They were scared off. The telepathic sending station for the animals was a great bank of intricate, glittering machine, through which strips of colored film with images slid into slots and machine mouths that translated them into thought-emanations. A damned neat piece of genius. Irish. "We haven't a ship or a space-radio, and more guards'll turn the engineers who created them, you nut."

<question>:
What is not a type technology that is used in this story?

<options>:
A Tasers that paralyze individuals and render them unconscious
B Highly advanced space travel
C Tools that allow one to distort how someone else perceives reality
D Filming devices

<answer>:

A