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

<passage>:
She prayed that a God would come from the skies and carry her away to bright adventures. But when he came in a metal globe, she knew only disappointment—for his godliness was oddly strange! [Transcriber's Note: This etext was produced from Extensive research did not uncover any evidence that It was twilight on Venus—the rusty red that the eyes notice when their closed lids are raised to light. Against the glow, fantastically twisted trees spread claws of spiky leaves, and a group of clay huts thrust up sharp edges of shadow, like the abandoned toy blocks of a faint and wistful sigh. One of the voices mourned, in the twittering Venusian speech, "How I envy you, Koroby! I wish I were being married She left them, moving gracefully to the door. Venus-girls were generally of truly elfin proportions, so delicately slim that they seemed incapable of the slightest exertion. But Koroby's body was—compared to her friends'—voluptuous. deepen to purple. "I want romance," she said, so softly that the girls had to strain forward to hear her. "I wish that there were other worlds than this—and that someone would drop out of the skies and claim "Well—heigh-ho! There don't seem to be any other worlds, and nobody is the Stone City." She ran slim hands down her sides, smoothing the blue sarong she gnau -hide strips, the crude but beautifully-carved charts and chests. the lights of the other litter-bearers, colored sparks as befitted a wedding-conveyance. The winking lights were enclosed in shells of colored glass for another reason—the danger of their firing the papery jungle verdure. It was not a new litter, built especially for the occasion—Yasak was them they rustled dryly. Too bad—it had been such a dry year— and again, "Oh, if only—!" But the music trickled on, and nothing gnau ?" she asked. the music dust-storms, but brilliantly green. A silence, then staccatto reports, certainly not thunder—unlike any sound that Koroby had ever heard. There was a babble of voices as the musicians crowded together, asking what had it been, and where—just exactly—could one suppose it had happened, that thunder—was it going to storm! "Lady—believe me—it's impossible. There's nothing but matted jungle knows how far away that light is? Besides, you're on your way to be demoralized. The musicians had not accompanied them, preferring to carry the message to Yasak in the Stone City that his prospective bride had gone off on a mad journey. The bearers were powdered grey they had abandoned the litter finally. Her blue drapery was ripped and face had hid its youthful color, aging her. The expedition emerged from the jungle on a sandy stretch of barren land. A thousand feet away a gigantic metal object lay on the sand, crumpled as though it had dropped from a great distance. It had been globular before the crash, and was pierced with holes like windows. What could it possibly be? A house? But whoever heard of a metal house? Why, who could forge such a thing! Yasak's house in the City had iron doors, and they were considered one of the most wonderful things of the age. It would take a giant to make such a ponderous thing as this. almost frightening, unhuman, mechanical. It was unlined and without expression, somehow unreal. Mysterious, compelling. He was clothed very peculiarly. A wonderfully-made metallic garment enclosed his whole body—legs and all, unlike the Venus-men's tunics. Even his feet were covered. Perhaps it was armor—though the Venus-men usually wore only breastplate and greaves. And a helmet hid all of the man's head except his face. Around his waist was a belt with many incomprehensible objects dangling from it. If he was so well armored, why was he not carrying a sword—a dagger at least! Of what use were those things on his belt—for instance, that notched L-shaped thing? It would not even make a decent club! The stranger did not speak, merely gazed deeply into Koroby's eyes. And in them. She spoke her thought: "What are you doing? You seem to be such a wonderful voice—it was as she had always dreamed it! But she had never really believed in the dream.... He was looking at the wrecked globe of metal. "So there are people on Venus!" he said slowly. He turned his mask of a face to her. "My name? I have none," he said. "No name? But who are you? Where are you from? And what is that?" She pointed at the metal globe. She had no concept of stars or space, and he could not fully explain. "From a world known as Terra." Terra—it is incredibly far away." are some tribes beyond the jungle whose language is unlike ours—" memory." "Remarkable indeed!" she mocked. "No one here could do that." "But my race is infinitely superior to yours," he said blandly. "You little people—ah—" He gestured airily. "You see nothing about me worthy of your respect? Are you infinitely superior to me— me ?" you think you are? A god?" He shook his head. "No. Just better informed, for one thing. And—" Koroby cut him short. "What's your name?" "What do you mean, you have none?" was not quite a sigh. "Here I am stranded on Venus, my ship utterly wrecked, and I'm due at the Reisezek Convention in two weeks. You"—he gripped Koroby's shoulder, and his strength made her wince—"tell me, "Good," he said. "Let's go there." They took another glance at the metal globe and the green fire, which by now had died to a fitful glimmer. Then the stranger and the girl it seems that there are materials which I can utilize in building a signal—" He was walking along, head erect, apparently quite at ease, while the she was bleeding from many scratches. She tripped over tangled roots and exclaimed in pain. Then the man took one of the strange implements from his belt, pressed a knob on it, and light appeared as if by magic! because she wanted to impress this indifferent man that she was not as inferior as he might think—but now she could not go on. With a little weave. The furniture was elegantly carved and painted there were even paintings on the walls. been lying here for weeks. Where's Yasak? Where's the strange man in armor?" "Yasak's out somewhere. The stranger man is in the room at the end of the hall." one of the carved chairs, fussing over some scraps of metal on the table. He did not look up. love is!" "I had a faint idea of it when I looked into your mind," he said. "I'm afraid I haven't any use for it. Where I come from there is no love, that I'm not worthy of you—" you! You don't care the least bit about me—and I've shamed myself in twisting pillar, brighter than even the dust-palled sky, lighting the buildings and the prairie. The heat was dreadful. laid clear. There were exclamations of amazement and perplexity from the people. It was a metal skeleton, and the fragments of complicated machinery, caked with soot. "He wasn't human at all!" Yasak marvelled. "He was some kind of a toy made to look like a man—that's why he wore armor, and his face never changed expression—" "Magic!" someone cried, and backed away. "Magic!" the others repeated, and edged back ... and that was the end of one of those robots which had been fashioned as servants for Terrestial men, made in Man's likeness to appease Man's vanity, then conquered him.

<question>:
What technology have the people of Venus not developed?

<options>:
A Electricity
B Glassmaking
C Creating fire
D Metallurgy

<answer>:

A