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

<passage>:
Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] A Konv cylinder was the key to space—but there was one power it could not match! They lived in a small house beside the little Wolf river in Wisconsin. They were able to make ends meet. Her neighbors knew nothing of the money she had brought with her to Wisconsin. They didn't even know that she was not a native. She never spoke of it, except at first, when Earl was a boy of seven and they had just come there to live. Then she only said that she came from the Agents had killed her husband. but she never spoke of this and she was very careful not to move from place to place except by the conventional methods of travel. "There goes one of the old-fashioned ones. That hair-do was popular back in the sixties." They did not suspect that she did this only to cover the thin, pencil-line scar, evidence that a small cylinder lay under her skin behind the ear. For Mrs. Jamieson was one of the Konvs. Her husband had been one of the small group who developed this tiny instrument. Not the inventor— his scientific minds proved it to be a semi-conductor. Yet it held the power to move a body instantly from one point in space to any other point. Each unit was custom built, keyed to operate only She learned that he was an Agent completely by accident. While cleaning the cabin one morning his badge fell out of a shirt pocket. She stood while her husband had been one of twenty-eight persons. She decided then that her efforts would be too ineffective. The odds were wrong. She would wait until her son, Earl, was grown. Together they would seek revenge. He did not have the cylinder—not yet. But he would. The Konvs took care of their own. Her husband had been one of the first, and they would not forget. One could be lived. It happened to Earl one hot summer day when he was fourteen. Mrs. violently, so that she was forced to slap him to prevent hysteria. She looked behind his ear. He started for his room, but she stopped him. "No, do it right here. You may as well get used to it now." "Get used to what?" "But what happened? What is this patch behind my ear?" "But they shouldn't have! They didn't even ask me!" He started for the door, but she called him back. "No, don't run away So he sat across the kitchen table from her, and she told the whole history, beginning with Stinson sitting in the laboratory in New Jersey, holding in his hand a small cylinder moulded from silicon with controlled impurities. He had made it, looking for a better micro-circuit structure. He was holding this cylinder ... and it was a cold day outside ... and he was dreaming of a sunny Florida beach— On the plane back to New Jersey he came to certain conclusions regarding the strange power of his device. He tried it again, secretly. Then he made more cylinders. He was the only man in the world who knew how to construct it, and he kept the secret, giving cylinders to selected people. He worked out the basic principle, calling it a kinetic ordinate of negative vortices, which was very undefinitive. The arrested man disappeared from his jail cell, and the next morning the Agent was found strangled to death in his bed. This set off a reason for noticing them at all was lost. Normal men no longer thought of them as human. Mrs. Jamieson told how Stinson, knowing he had made too many cylinders "Of course they do—because they don't understand! They are afraid of river to cool herself. For the remainder of that summer they worked together. They practiced at night mostly, taking longer and longer jumps, until Earl's confidence allowed him to reach any part of the Earth he chose. She They would select a spot sufficiently remote to insure detection, she then they would quickly Had she returned to Earth? The question did not trouble them long. They Even before the summer was over, he matured. The childish antics of his friends began to bore him. "Be careful, Earl," his mother would say. "Remember who you are. Play with them sometimes, even if you don't like describe the horror in Lisa's young mind when the news went out that Sometimes when she talked about her husband, Mrs. Jamieson wanted to stand up and scream at her son, "Hate, hate! Hate! You must learn to hate!" But she clenched her hands over her knitting, knowing that he would learn it faster if she avoided the word. The winter passed, and the next summer, and two more summers. Earl was ready for college. They had successfully kept their secret. She did not mention her secret hope, that before they left Earth he would have fully avenged his father's death. He was clever and intelligent. So she exhumed the money she had hidden more than ten years before. the university." "Why not? Stinson selected only educated, intelligent people. When one dies the cylinder is taken and adjusted to a new thought pattern—usually a person from the same family. I would say it is very She turned her back and slammed the door. Earl stood very still for bedroom. He did not mention his frustrated desires to be normal, not after the first attempt, but he persisted in his efforts to be so. Use of the cylinder was out of the question for them now, anyway. In the spring Mrs. Jamieson caught a virus cold which resulted in a long convalescence. Earl moved into the new bedroom. At first she she soon grew aware of her mistake. killed himself. Mrs. Jamieson dropped the paper immediately and went When she arrived at her own home, Earl was in his room. "Where have you been?" she asked petulantly. "What did you do?" she asked. Mrs. Jamieson had to sit down. Finally she was able to ask, "How did it her mind, they even sounded like ordinary names—and they shouldn't! She had always thought that those names, if she ever saw them, would whispered to the flowered wallpaper. She didn't care that no one heard her. She didn't know where the men were now, those who had killed her some cylinders might even be taken by Agents—and used by them, for the power and freedom the cylinders gave must be coveted even by them. And they were in the best position to gain them. She was consumed by fear that one or more of the men on Earl's list might have acquired a She knew. She had found a gun in Earl's desk. Mrs. Jamieson's face colored, then drained white. So much strength and rage was in her arm that the blow almost sent him spinning. They faced each other, she breathing hard from the exertion, Earl stunned immobile—not by the blow, but from the knowledge that she She controlled herself. "We must find a way to leave here," she said, calmly. "They won't find us." She did not answer him. Finally he said, "It doesn't make sense to you, "Benjamin!" she cried. "I knew someone would come." thought Jamieson—I mean, your father—did it. Jamieson was the greatest man among us. It was he who first conceived the theory that there was a basic, underlying law in the operation of the cylinders. Even now, no one knows how the idea of love ties in with the Stinson Effect but we do know that hate and greed as motivating forces can greatly minimize the cylinders' power. That is why the undesirables with cylinders have never reached Centaurus." "We'd better hurry," Mrs. Jamieson said. Benjamin held out his hands. They took them, to increase the power of the cylinders. As the Agents pounded on the door, Mrs. Jamieson flicked one thought of hatred at them, but of course they did not hear her. Benjamin's hands gripped tightly. She no longer felt the hands. She was still in the room! Benjamin and her son were gone. Her outstretched hands touched nothing. Her power was gone! them, then ran to Earl's desk, fumbling for the gun. Mrs. Jamieson could not remember, before she died.

<question>:
Why did the woman not realize her cylinder no longer worked?

<options>:
A She was against using the cylinder
B She had not wanted to go to Centaurus
C She had avoided using it as part of her disguise
D She never learned how to use the cylinder

<answer>:

C