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 rich man died. His heirs sold it. Now it was well insulated and Mrs. Jamieson and her son were very comfortable, even in the coldest spoke of it, except at first, when Earl was a boy of seven and they had Agents had killed her husband. That was back in '07, on the eve of his departure for Alpha Centaurus but she never spoke of this and she was very careful not to move from 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 by the thought pattern of the particular individual. stayed in one of her cabins. She learned that he was an Agent completely by accident. While cleaning 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 Her husband had been one of the first, and they would not forget. One day the boy would disappear for a few hours. When he returned the small patch of gauze would be behind his ear. She would shield him until the opening healed. Then no one would ever know, because now they could do it without leaving the tell-tale scar. Then they would seek revenge. Later they would go to Alpha Centaurus, where a life free from Agents could be lived. It happened to Earl one hot summer day when he was fourteen. Mrs. nude. At sight of his mother his face paled and he began to shake "Mom!" he cried. "Mom!" Apparently they did not miss him. Mrs. Jamieson handed him a pair of You may as well get used to it now." "Get used to what?" "What?" "Never mind. What happened just now?" "But what happened? What is this patch behind my ear?" "Well, don't take on so. You'll get used to it." "But they shouldn't have! They didn't even ask me!" story, you know. You hear only one side in school—their side. There is "But you were only nine!" Mrs. Jamieson held out her hand. "Come here, son. It's time I told you 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 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. of them as human. Mrs. Jamieson told how Stinson, knowing he had made too many cylinders and given them unwisely, left Earth for Alpha Centaurus. He went alone, not knowing if he could go so far, or what he would find when he arrived. But he did arrive, and it was what he had sought. "You have asked many times," Mrs. Jamieson said, "how your father died. Now I will tell you the truth. Your father was one of the great ones, along with Stinson and Benjamin and Dr. Straus. He helped plan the escape "Of course they do—because they don't understand! They are afraid of That is, the first shock was over. Mrs. Jamieson watched Earl leave the the initial shock wore off he might experiment with his new power. He would find only the bare footprints of a woman and a boy. They would the offenders, since they had discovered, even before Stinson took his group to Centaurus, that individuals had thought patterns peculiar to themselves. These could be identified, if caught on their detectors, and even recorded for the files. But the files proved confusing, for they said that Mrs. Jamieson had gone to Centaurus with the others. Had she returned to Earth? The question did not trouble them long. They had more serious problems. Stinson had selected only the best of the Konvs when he left Earth, leaving all those with criminal tendencies behind. They could have followed if they chose—what could stop them? 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 great ones," he would say, and she would repeat all the things she discussing them. She would tell about Benjamin's wife, Lisa, and try to describe the horror in Lisa's young mind when the news went out that E. Mason Jamieson had been killed. She wanted him to learn as much as possible about his father's death, knowing that soon the Agents would stand up and scream at her son, "Hate, hate! Hate! You must learn to would learn it faster if she avoided the word. Earl was ready for college. They had successfully kept their secret. rendezvous. "When you have finished college," Mrs. Jamieson told her son, "we will go to Centaurus." "Why not now?" "Because when you get there they will need men who can contribute to the development of the planet. Stinson is a physicist, Benjamin a metallurgist, Straus a doctor. But Straus is an old man by this time. A young doctor will be needed. Study hard, Earl. Learn all you can. Even the great ones get sick." 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. He could kill many Agents. So she exhumed the money she had hidden more than ten years before. This was her husband's money she was spending now. It needed to last 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 "I'm not like most boys, mother. The Konvs saw to that. Sometimes I'm "No, I don't!" she said sharply. "You're old enough to face realities. Have you forgotten your own father? 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. she soon grew aware of her mistake. killed himself. Mrs. Jamieson dropped the paper immediately and went of crimes committed by the man and his wife, and determined to prevent "Oh, here and there." "What were you looking for?" "I don't know," he said. "Curiosity, maybe, or a subconscious desire breaking the lock or even a window. He seemed to know. He did ask what terrible thing, but must be done. We don't want your secret Mrs. Jamieson stopped on her way out of the room and laid a hand on his arm. "Your father would have been proud of you," she said. "Soon you Beyond the closed door, out of sight of her son, Mrs. Jamieson gave If one of them is killed, he will have to tell what he knows." picked from the most intelligent people on Earth. It will be a small job for them. Don't forget they know who you are. Even if you hadn't that your father and I had a son. Your birth was recorded. The only She did not answer him. Finally he said, "It doesn't make sense to you, He smiled. "This is your son?" "Your father was afraid you would be twins." Earl said, "Why was my father killed?" greatest man among us. It was he who first conceived the theory that 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." Heavy steps sounded on the porch outside. Benjamin and her son were gone. Her outstretched hands touched nothing. Love, Benjamin said, the greatest of these is love. Or did someone Mrs. Jamieson could not remember, before she died.

<question>:
What is the most important lesson the mother passes on to the son?

<options>:
A Agents are adversaries
B Not all Agents are bad people
C To study hard and follow his heart
D To become an engineer so he is needed on Centaurus

<answer>:

A