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

<passage>:
Walsh's madness—murder-madness—when he ordered Major Polk to scan the planet for a guy named Joe. November 1952. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Colonel Walsh had a great sense of humor. I hated his guts ever since we went through the Academy together, but he had a great sense of humor. For example, he could have chosen a Second Looie for the job on Venus. it, the most I ever did was inspect a few defective tubes every now and then. The rest was gravy, and Colonel Walsh wasn't going to let me get by with gravy. "It will be a simple assignment, Major," he said to me, peering over "The man is a trader of sorts. Rather intelligent." He paused, then added, "For a native, that is." I had never liked Walsh's attitude toward natives. I hadn't liked the way he'd treated the natives on Mars ever since he'd taken over there. Which brought to mind an important point. "He's had many dealings with the natives there," Walsh explained. "If If Walsh really wanted to know the reasons for the revolt, I could give them to him in one word: Walsh. I had to laugh at the way he called it "revolt." It had been going on for six months now and we'd lost at least a thousand men from Space II. Revolt. At the Academy he had called me Fred. That was before I'd reported him for sleeping on Boiler Watch. He'd goofed off on a pile of uranium that could've, and almost did, blow the barracks sky-high that night. He still thought it was my fault, as if I'd done the wrong thing by "I don't know, sir." "A relatively simple assignment," Walsh said. Personal habits? Anything?" Walsh seemed to consider this for a moment. "Well, physically he's like any of the other Venusians, so I can't give you much help there. He does have a peculiar habit, though." about Colonel Leonard Walsh and how he was supposed to be quelling that revolt. Ever since Walsh had taken command, ever since he'd started pushing the natives around, there'd been trouble. It was almost as if the whole damned planet had blown up in our faces the moment he took over. Swell guy, Walsh. looked as hot as hell. On the inside it was about two degrees short of that mark. I began to curse Walsh for taking me away from my nice soft job in Space II. Among the natives, I mean. Sure. Oh sure. Real simple. Walsh was about the lowest, most contemptible.... "Hello, Joe," he said. "How's it going?" "Not so hot, Joe," the bartender replied. I listened in fascination. Joe, Joe, Joe. So this was Walsh's idea of a great gag. Very funny. Very.... "You Major Polk, sweetheart?" the Venusian who'd just come in asked. "Yes," I said, still thinking of Colonel Walsh. "You better get your butt over to the captain's shack," he said. "He's about ready to post you as overdue." So Walsh had taken care of that angle too. "And the natives are only now becoming acquainted with Terran culture. Lots of enlisted men, you know." I began to get the idea. And I began to appreciate Walsh's doubtful ancestry more keenly. Bransten was saying. I was beginning to get angry. Very angry. I was thinking of Walsh wasn't used to entertaining Majors. "The enlisted men. You know how they are. They'll ask a native to do something and they'll call him business, I mean. Now they're all Joe. They like it. That and the Walsh's face appeared on the screen. He was smiling, looking like a fat pussy cat. "What is it, Major?" he asked. "This man Joe," I said. "Can you give me any more on him?" Walsh's grin grew wider. "Why, Major," he said, "you're not having any difficulties, are you?" "None at all," I snapped back. "I just thought I'd be able to find him a lot sooner if...." "Take your time, Major," Walsh beamed. "There's no rush at all." "I thought...." "I'm sure you can do the job," Walsh cut in. "I wouldn't have sent you otherwise." Hell, I was through kidding around. "Look...." He blinked at the screen, trying to realize I'd deliberately hung up on him. "Polk!" he shouted, "can you hear me?" One: I could say the hell with Walsh and Venus. That would mean hopping the next ship back to Earth. It would also mean disobeying the direct order of a superior officer. Captain, the small garrison attached to the Station, and me. I began wondering why Walsh had gone to so much trouble to get rid of me. The job, as I saw it, would take a hell of a long time. It seemed like a silly thing to do, just to get even with a guy for something that had happened years ago. He surely must have realized that I'd be The thought hadn't occurred to me before this, and I began to consider it seriously. Walsh was no good, rotten clear through. He was failing at the job of keeping Mars in hand, and he probably realized that a few more mistakes on his part would mean the end of his career with But what probably bothered him more was the fact that I was next in command. If he were transferred, I'd be in charge of Space II, and I could understand how much that would appeal to Walsh. I tried to figure the thing out sensibly, tried to weigh his good about the whole affair. Leonard Walsh. the nose, and a lot of things became clear then. I also saw Walsh standing near one of the huts, a stun gun in his hand. "Hello, Major," he called, almost cheerfully. The gun didn't look was getting a big kick out of all this. Like a kid playing a game. I faced Walsh again. "Okay, what's it all about, pal?" "Colonel," Walsh corrected me. "You mustn't forget to say Colonel, Major ." He emphasized my rank, and he said it with a sort of ruthless finality. I waited. I could see he was just busting to tell me how clever he'd been. Besides, there wasn't much I could do but wait. Not with Walsh when you decided to cork off." Beside me, Joe chuckled a little, enjoying the game immensely. "You didn't have to report me," Walsh said. "No? Maybe I should have forgotten all about it? Maybe I should have nudged you and served you orange juice? So you could do it again sometime and maybe blow up the whole damn Academy!" Walsh was silent for a long time. When he spoke his voice was barely audible. The heat was oppressive, as if it were concentrated on this little spot in the jungle, focusing all its penetration on a small, "You brought the Mars business on yourself," I told Walsh. "There was never any trouble before you took command." "The natives," he practically shouted. "They ... they...." "What about the natives?" I asked. "Nothing," Walsh said. "Nothing." He was silent for a while. "A man of my calibre," he said then, his face grim. "Dealing with

<question>:
What is the relationship between Polk and Walsh? What is the central complication in their history together?

<options>:
A Colonel Walsh is Major Polk’s senior officer. Their relationship became contentious in boot camp, when Walsh reported Polk for falling asleep on the job.
B Colonel Walsh is Major Polk’s ex best friend. Their relationship became contentious during the Terran occupation of Mars, when Polk realized Walsh was prejudiced against Martian natives.
C Colonel Polk is Major Walsh’s ex best friend. Their relationship became contentious in boot camp, when Polk reported Walsh for falling asleep on the job.
D Colonel Walsh is Major Polk’s senior officer. Their relationship became contentious in boot camp, when Polk reported Walsh for falling asleep on the job.

<answer>:

D