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

<passage>:
Retief gave them more of "How many men do you need for the harvest, Hank?" Retief inquired. beret from the clothes tree. "I'm off now, Retief," he said. "I hope "Listen, Jim," Retief said. "I want you to go over to the warehouse and Retief waited while the dispatch clerk carried out the errand. The "I see they're sending two thousand students to d'Land," Retief said, Retief gave instructions, then rang off and turned to Arapoulous. A buzzer sounded. Retief punched a button. "What is it, Miss Furkle?" "This fellow's a confounded pest. I'll leave him to you, Retief," "If I'd thought of that, I'd have worn my other suit," Retief said. sight of Retief, looked him over momentarily, then advanced and held Retief dropped his hand and motioned to a chair. Retief." But this year...." "The crop isn't panning out?" "Oh, the crop's fine. One of the best I can remember. Course, I'm only twenty-eight I can't remember but two other harvests. The problem's not the crop." "Have you lost your markets? That sounds like a matter for the Commercial—" Retief looked at the two squat bottles, one green, one amber, both Retief took two thin-walled glasses from a table beside the desk. "Come "Say, this business of alternating drinks is the real McCoy," Retief who can fill the most baskets in an hour.... The sun's high and bright, As the council meeting broke up, Retief caught the eye of a colleague sole concern of the Motorized Equipment Depot, Division of Loans and Exchanges." He pursed his lips. "However, I suppose there's no harm in telling you. They'll be receiving heavy mining equipment." "Strip mining gear." Whaffle took a slip of paper from a breast pocket, blinked at it. "Bolo Model WV/1 tractors, to be specific. Why is MUDDLE interested in MEDDLE's activities?" "Forgive my curiosity, Mr. Whaffle. It's just that Croanie cropped up "That's not MEDDLE's affair, sir," Whaffle cut in. "I have sufficient problems as Chief of MEDDLE without probing into MUDDLE'S business." "Speaking of tractors," another man put in, "we over at the Special Committee for Rehabilitation and Overhaul of Under-developed Nations' General Economies have been trying for months to get a request for facilities of the college." "I wonder if the Bogans know that?" "The Bogans? Why, most of d'Land's difficulties are due to the unwise Retief stopped by the office to pick up a short cape, then rode the "Yeah. Bunch of babies. Kids. How they expect—Never mind. Have one on me." "Thanks," said Karsh. "They'll stay here until take-off time. Can't have the little dears wandering around loose. Might get ideas about going over the hill." He hiccupped. "I mean they might play hookey." "Suit yourself," Retief said. "Where's the baggage now?" "Not this time," Retief said. He watched the students, still emerging Back at the MUDDLE office, Retief buzzed Miss Furkle. "Where does doing your job stop and prying begin, Miss Furkle?" Retief "For the present. Miss Furkle, Mr. Magnan is vacationing. That leaves me with the question of two thousand young male students headed for a world with no classrooms for them ... a world in need of tractors. But the tractors are on their way to Croanie, a world under obligation to Boge. And Croanie holds a mortgage on the best grape acreage on Lovenbroy." "I hope you're not questioning Mr. Magnan's wisdom!" "About Mr. Magnan's wisdom there can be no question," Retief said. "But never mind. I'd like you to look up an item for me. How many tractors will Croanie be getting under the MEDDLE program?" "Why, that's entirely MEDDLE business," Miss Furkle said. "Mr. Magnan always—" "I'm sure he did. Let me know about the tractors as soon as you can." Miss Furkle sniffed and disappeared from the screen. Retief left the "There must be an error somewhere," Retief said. "The Bolo model I want is a tractor. Model WV M-1—" "Oh, the modification was the addition of a bulldozer blade for demolition work. That must be what confused you." wanted," she said. "I've had it for over ten minutes. I was under the impression you needed it urgently, and I went to great lengths—" "Sure," Retief said. "Shoot. How many tractors?" "Five hundred." "Are you sure?" Miss Furkle's chins quivered. "Well! If you feel I'm incompetent—" "Just questioning the possibility of a mistake, Miss Furkle. Five hundred tractors is a lot of equipment." "Was there anything further?" Miss Furkle inquired frigidly. "I sincerely hope not," Retief said. Attache. "Retief here, Corps HQ," he said airily. "About the MEDDLE shipment, the tractors. I'm wondering if there's been a slip up. My records show we're shipping five hundred units...." "That's correct. Five hundred." Retief waited. "Ah ... are you there, Retief?" tractors." "It's perfectly in order. I thought it was all settled. Mr. Whaffle—" "One unit would require a good-sized plant to handle its output," ore. It doesn't. By the way, isn't a WV a poor choice as a mining outfit? I should think—" "See here, Retief! Why all this interest in a few surplus tractors? And in any event, what business is it of yours how we plan to use the equipment? That's an internal affair of my government. Mr. Whaffle—" "I'm not Mr. Whaffle. What are you going to do with the other four hundred and ninety tractors?" "I understood the grant was to be with no strings attached!" "I know it's bad manners to ask questions. It's an old diplomatic "Nothing like that, Retief. It's a mere business transaction." "Great Heavens, Retief! Don't jump to conclusions! Would you have us branded as warmongers? Frankly—is this a closed line?" "Certainly. You may speak freely." "The tractors are for transshipment. We've gotten ourselves into a difficult situation, balance-of-payments-wise. This is an accommodation to a group with which we have rather strong business ties." Retief said. "Any connection?" "Why ... ah ... no. Of course not, ha ha." "Who gets the tractors eventually?" "Retief, this is unwarranted interference!" "Who gets them?" look here, Retief, this isn't what you're thinking!" "How do you know what I'm thinking? I don't know myself." Retief rang to provide transportation." "Will there be any other students embarking this season?" "Why ... perhaps. That's Boge's business." Gulver looked at Retief with pursed lips. "As a matter of fact, we had in mind dispatching another The buzzer sounded. Retief flipped a key. "MUDDLE, Retief speaking...." "How-do, Retief. Okay if I come up?" Retief," he said. "But have you got anything for me?" Retief waved at the wine bottles. "What do you know about Croanie?"

<question>:
Why is Retief so concerned about the tractor order?

<options>:
A Because he knows whoever ordered the tractors has bad intentions.
B Because he knows the order is a mistake.
C Because the order of tractors is unusually large.
D Because no one else appears to be concerned about the tractors.

<answer>:

C