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

<passage>:
going—but I know that if I stuck to the old man, I was a comer ... even if he was a goner! Doc had this solemn human by the throat when I caught up with him. "Tonight," Doc was saying in his old voice that was as crackled and " What is Doc's full name? "Sure," the man agreed severely, prying a little worriedly at Doc's " I almost fell in, but at the last instant I caught myself and said, I came alongside and carefully started to lever the old man loose, one finger at a time. It had to be done this way. I had learned that during all these weeks and months. His hands looked old and crippled, but I felt they were the strongest in the world. If a half dozen winos in Seattle hadn't helped me get them loose, Doc and I would have been So I was an Earthman, Doc's son. So my addiction to coffee was all in my mind. That didn't change anything. They say sex is all in your mind. layered with lumpy fat, was beginning to muscle-dance against my side. One of his times was coming on him. Then at last he was free of the It was easier this night and that made me afraid. Doc's thin frame, I didn't want to be cured. I wouldn't be. Doc was gone. That was all I had now. That and the thing he left. "The rest is simple," Andre said. "Doc O'Malley bought up all the stock in a certain ancient metaphysical order and started supplying members Sharp, you know. I.... Say, the poor old guy looks sick. Want any help?" I told the human no, thanks, and walked Doc toward the flophouse three doors down. I hoped we would make it. I didn't know what would happen with certain books. Can you imagine the effect of the psychology terms the subconscious, has always known about the powers of ESP, telepathy, telekinesis, precognition. Through these books, the human race can tell itself how to achieve a state of pure logic, without food, without sex, without conflict—just as Doc has achieved such a state—a little late, true. He had a powerful guilt complex, even stronger than your withdrawal, over releasing this blessing on Then I realized what was about to happen. It was foolish and awful and true. I was going to have one of mine at the same time Doc was having kept getting closer each of the times. I tried not to think about it and helped Doc through the fly-specked flophouse doors. found him, but now it was worse. For some undefinable reason, I felt we Andre did not deny that he wanted it to fall into his hands. I knew I could not let Doc's—Dad's—time travel thing fall into Doc was quivering against me, his legs boneless. "We can always make it over to the mission," I lied. to have this secret, Kevin," the to pieces and stomped on the pieces. Maybe you can't stop the progress of science, but I knew it might be millenniums before Doc's genes and creative environment were recreated and time travel was rediscovered. Maybe we would be ready for it then. I knew we weren't now. this is to happen." before I could move, what with holding up Doc. register hard. I'm not as strong in my hands as Doc, but I managed. arthritic fingers that were clamped on his collar. "No argument. Sure, I let go of him. He didn't scare me, but Doc was beginning to mumble and that did teeth!" high. The other foot was finished in chicken wire. There was a wino singing on the left, a wino praying on the right, and the door didn't have any lock on it. At last, Doc and I were alone. I laid Doc out on the gray-brown cot and put his forearm over his face to shield it some from the glare of the light bulb. I swept off all the scalp still smarted from the alcohol I had stolen from a convertible's gas tank to get rid of Doc's and my cooties. Lucky that I never needed Doc began to mumble louder. I knew I had to move. I waited just a moment, savoring the painless peace. Then, finally, I From the bed, Doc said a word. "Son." my mind and my eyes through the electric flashes of agony, so I concentrated on Doc's voice and trusted my hands would follow their habit pattern and construct the symbols for his words. They were suddenly distinguishable. wanted for the murder of a North American Mountie. search of what. "He didn't use that," Andre said. I knew that these words were what I had been waiting for. They told everything I needed to know to become the most powerful man in the Solar Federation. That wasn't just an addict's dream. I knew who Doc was. When I got to thinking it was just a dream and that I was dragging this old man around North America for nothing, I remembered who he was. I remembered that he was somebody very important whose name and work I had once known, even if now I knew him only as Doc. Pain was a pendulum within me, swinging from low throbbing bass to high screaming tenor. I had to get out and get some. But I didn't have a Doc alone, but I had to. He was starting to cry. He didn't always do that. I listened to him for a moment, then tested and tasted the craving that crawled through my veins. I got back inside somehow. Doc was twisting on the cot, tears washing white streaks across his face. I shoved Doc's face up against my chest. I held onto him and let him bellow. I soothed the lanks of soiled white hair back over his lumpy skull. men like Doc and me. his. That was bad. It had happened a few times right after I first the inhabited universe, but reason finally prevailed. He had reached a the one on the other side was praying, same as before. Only they had changed around—prayer came from the left, song from the right. Doc sat on the floor in the half-darkness and he had made a thing . Doc had ever made anything. It didn't look like much, but it was a start. He had broken the light bulb and used the filament and screw bottom. I knelt beside Doc. "An order, my boy, an order," he whispered. before dismantling it, to write something. I tilted the notebook against the neon light, now red wine, now fresh grape. I read it. "Concentrate," Doc said hoarsely. "Concentrate...." Then I realized what I had been trying to get from Doc all these couldn't trust to my own senses as he did. symptoms." The admiration and affection for this man that had been slowly building Accepting the sheaf of papers and not looking back at these two great and good men, I concentrated on my own time and Doc. Nothing happened. Doc was lying on the cot, half his face twisted into horror. I watched her face flash blue, red, blue and knew she meant it. But I had known too much in too short a time. I had to help Doc, but there was something else. I had to help Doc. I had to have some coffee. "What do you want?" "Listen, Kevin. Listen carefully to what I am saying. Doc found a method of time travel. It was almost a purely mathematical, topographical way divorced from modern physical sciences. He kept it his crusades. How can you make money with time travel?" I didn't know whether she was asking me, but I didn't know. All I knew was that I had to help Doc and get some coffee. "It takes money—money Doc didn't have—to make money," Miss Casey said, "even if you know what horse will come in and what stock will prosper. Besides, horse-racing and the stock market weren't a part of Doc's character. He was a scholar." Why did she keep using the past tense in reference to Doc? It scared

<question>:
Why did the narrator think Doc held the key to becoming powerful?

<options>:
A Doc's inventions would allow them to take over the world
B His bond with Doc meant he had, in a way, already experienced the result of what he was developing
C Doc had promised him the technology to reach the Moon, and this would be worth a lot of money
D He knew Doc would be able to find a way to break addiction, improving life for everyone

<answer>:

B