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

<passage>:
There were more Joes on Venus than you could shake a ray-gun at. Perhaps there was method in Colonel Walsh's madness—murder-madness—when he ordered Major Polk to scan the planet for a guy named Joe. [Transcriber's Note: This etext was produced from Planet Stories 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 job? Why me?" Instead, I nodded and watched him playing with his fingers. "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 "He's had many dealings with the natives there," Walsh explained. "If anyone can tell us the reasons for the revolt, he can." 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 "Yes," Walsh said. "A native, you know. They rarely go in for more than like Joe. Among the natives, I mean." "I don't know, sir." "A relatively simple assignment," Walsh said. Walsh seemed to consider this for a moment. "Well, physically he's like 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 over. Swell guy, Walsh. "You've got the wrong number," he said, and I was a little surprised at his use of Terran idiom. "You are Joe, aren't you? Joe the trader?" "Oh," I said, my voice conveying my disappointment. I sighed and began wondering just how I should go about contacting the Joe I was looking for. My orders said I was to report to Captain Bransten immediately upon arrival. I figured the hell with Captain Bransten. I outranked him "Joe," he said again. A faint glimmer of understanding began to penetrate my thick skull. "You wouldn't happen to be Joe the trader? The guy who knows all about Mars, would you?" "I never left home," he said simply. "What are you drinking?" "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 So Walsh had taken care of that angle too. He does have a peculiar "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. 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 Joe. 'Hey, Joe, give me a hand with this.' Or 'Listen, Joe, how'd you "Do you understand, Major? Just a case of extended idiom, that's all." "What is it, Major?" he asked. 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?" trader Joe who knew the Martians well. I could always admit failure, of course, and return empty handed. Mission not accomplished. Or, I might really find a guy who was trader Joe. I made my decision quickly. I wanted to stay in the Service, and besides Walsh may have been on the level for the first time in his life. Maybe there was a Joe here who could help us on Mars. If there was I'd try to find him. It was still a hell of a trick though. His face broke into a wide grin. "No danger of that, boss," he said. When he was gone I began figuring out a plan of action. Obviously, I'd just have to traipse through the jungle looking for a guy named Joe on 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 Or maybe he didn't expect me to come back. 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 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 would deliberately do just about anything. Sending me off on a wild goose chase after a character named Joe may have been a gag. But it may have been something a little grimmer than a "Possibly," Joe mused, the smile creeping over his face again. "A wild goose chase. A fool's errand." friends had taken me all over the city, finally dropping me off at my own house where the whole gang was gathered for a surprise party. Joe reminded me of that friend. Joe was walking beside me, waving at the colonel, beaming all over with happiness. "I see you found your man," Walsh said. 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, 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 unimportant drama. "I'm on my way out," Walsh rasped. "Finished, do you understand?" Joe caught his breath sharply, and I wondered what Walsh was going to say about the natives. Apparently he'd realized that Joe was a native. "Nothing," Walsh said. "Nothing." He was silent for a while. "A man of my calibre," he said then, his face grim. "Dealing with savages." He caught himself again and threw a hasty glance at Joe.

<question>:
What is the significance of the mission Colonel Walsh gives Major Polk?

<options>:
A Walsh sends Polk on a fools errand in order to trick him into time away from Earth so that Walsh can botch the occupation on Mars once and for all.
B Walsh sends Major Polk on a fools errand so that he can trick Polk into the Venusian jungle and kill him, serving as revenge for the embarrassment Polk caused him years ago.
C Walsh sends Polk on a fools errands in order to trick him into a full time job on Venus.
D Walsh sends Polk on a fools errand in order to trick him into finding trader Joe, who is responsible for some of Walsh’s recent military problems.

<answer>:

B