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

<passage>:
were over. The Academy, with its great halls and classrooms and laboratories, lay hollow and silent, an exhausted thing at sleep after spawning its first-born. first! Mickey Cameron, sitting next to me, dug an elbow into my ribs. "I don't see 'em, Ben," he whispered. "Where do you suppose they are?" I blinked. "Who?" That was something I didn't have to worry about. My parents had died in a strato-jet crash when I was four, so I hadn't needed many of those "You are cordially invited" cards. Just one, which I'd sent to Charlie My gaze wandered over the faces, but I couldn't find Charlie's. It a hell of a lot more. They think there's nothing we can't do. I felt very small and very humble. I was scared. Damned scared. At last it was over, and the proud faces descended upon us in a huge, babbling wave. His wizened little body was shuffling down an aisle, his eyes shining like a child's. He'd been sandwiched, evidently, in one of the rear rows. tonight. Yes, siree, I got twenty-four hours, and we'll celebrate as good spacemen should!" Then Mickey strode up to us. He was his normal, boyish self again, introduction of Charlie. His tie was clumsily knotted, and a button on his coat was missing. And the left side of his face was streaked with dark scar tissue, the Charlie gulped helplessly, and Mickey said: "Still going to spend the weekend with us, aren't you, Ben?" Charlie, wouldn't you like a home-cooked meal before going back to the Moon?" Charlie's answer was obscured by a sudden burst of coughing. I knew that he'd infinitely prefer to spend his liberty sampling Martian fizzes and Plutonian zombies. But this night seemed too sacred for Charlie's kind of celebration. a tall, willowy man, spectacled, looking the way an academy professor should look. "Ben," he called, "don't forget that offer. Remember you've got two months to decide." "No, thanks," I answered. "Better not count on me." A moment later Mickey said, frowning, "What was he talking about, Ben? Did he make you an offer?" Then your last words came back and jabbed me: "That's what Mickey used to want." " You bit your lip, not answering. "What did she mean, Mickey?" Mickey looked down at his feet. "I didn't want to tell you yet, Ben. We've been together a long time, planning to be on a rocket. But—" My stomach was full of churning, biting ice. "What are you trying to say, Mickey?" of White Sands Port." He raised his hand to stop me. "I know. It's not so exciting. I'll just live a lot longer. I'm sorry, Ben." I couldn't answer. It was as if someone had whacked the back of my knees with the blast of a jet. "It doesn't change anything, Ben—right now, I mean. We can still have a good weekend." Charlie was muttering under his breath, smoldering like a bomb about to reach critical mass. I shook my head dazedly at him as we got to the Hell, I says, that ain't whoopin' cough, that's lung-rot." That was when your father said he wasn't so hungry after all. Afterward, you and I walked onto the terrace, into the moonlit night, "Charlie is funny, isn't he? He's nice and I'm glad he's here, but he's I smiled and shook my head. "If he had, he never mentioned it. Charlie I didn't understand at first, and I wanted to ask, "Give up what ?" fill their lungs with the clean rich air of Earth instead of poisonous dust. "I'm sorry," you said. "I didn't mean to make you sad, Ben." "It's all right," I said, clenching my fists. "You made sense—a lot of sense." The next morning Charlie said good-bye in our room. He rubbed his scarred face nervously as he cleared his throat with a series of thin, tight coughs. I scowled, not understanding. "Why, Charlie? What for?" He shrugged as if afraid he might be accused of sentimentality. "Oh, I shook the thought away. If Charlie was sick, he wouldn't talk about We watched him leave, you and Mickey and I. "When will you be back?" you asked. Charlie's hard face contorted itself into a gargoylish grin. "Maybe a Then he waved and strode away, a strange, gray, withered gnome of a man. I wanted him to say something, to tell me the secret that would kill the doubt worming through my brain. But he rounded a corner, still grinning and waving, and then he was gone. "Well, how about staying with us till you decide? Might as well enjoy Earth life while you can. Okay?" I felt like running from the house, to forget that it existed. I wanted someone to tell me one of the old stories about space, a tale of courage that would put fuel on dying dreams. much as I loved the stars. And I said, slowly, my voice sounding unfamiliar and far away, "Sure, I'll stay, Mickey. Sure." One morning I thought, Why must I make a choice? Why can't I have both Ben? You'd be like Charlie. Gone for You had to finish. "It was a monster." That night I lay awake, the fears and doubts too frantic to let me sleep. , I told myself. You can't stay here. You've got to make a choice. line in a history book. I cursed. I knew what Charlie would say. He'd say, "Get the hell out of there, boy. Don't let a fool woman make a sucker out of you. Get out there on the That's what he'd say. And yet I wanted you, Laura. I wanted to be with you, always. "Oh God," I moaned, "what shall I do?" Next morning the door chimes pealed, and you went to the door and My heart thudded crazily against my chest. It couldn't be! Not Charlie! I pressed the stud again. "... regret to inform you of death of Charles ..." voice droned on. You ran to it, shut it off. "I'm sorry, Ben, so terribly—" Without answering, I walked into my room. I knew it was true now. I remembered Charlie's coughing, his gaunt features, his drugged gaze. The metallic words had told the truth. I sat for a long time on my bed, crying inside, but staring dry-eyed at Charlie's faded tin box. This was what remained of Charlie after twenty-five years in space. Charlie sensed my indecision, that he left these things so that they could tell me what he could not express in words. no compromise. And you know, too, which path he finally chose. Do you know why he had to drug himself to watch me graduate? So he live to see. Charlie didn't leave just a few trinkets behind him. He He made his last trip to Luna when he knew he was going to die. Heaven knows how he escaped a checkup. Maybe the captain understood and was kind—but that doesn't matter now. he wanted to reach Mars? Do you know why he didn't want to die in the clean, cool air of Earth? be lonely when men like Charlie roam the spaceways? Charlie wanted me to himself that night after graduation. He wanted us to celebrate as spacemen should, for he knew that this would be his last night on Earth. It might have seemed an ugly kind of celebration to you, but he wanted it with all his heart, and we robbed him of it. Because of these things, Laura, I will be gone in the morning. Explain

<question>:
What isn't a reason that Charlie came to visit?

<options>:
A he wanted to convince him to stay on Earth
B he cared for him like a father
C he wanted to celebrate Ben's graduation
D he wanted to say goodbye

<answer>:

A