question:  Why is Retief so concerned about the tractor order?
context: [Transcriber's Note: This etext was produced from Worlds of If Science Fiction, September 1962. I Second Secretary Magnan took his green-lined cape and orange-feathered beret from the clothes tree. "I don't appreciate frivolity with reference to this Division," Magnan said testily. "I assume you jest, Retief," Magnan said sadly. "The Bogans have launched no less than four military campaigns in the last two decades. "Breaking and entering," Retief said. "Our function is merely to bring them together. I'll leave him to you, Retief," Magnan said. "If I'd thought of that, I'd have worn my other suit," Retief said. Retief punched Miss Furkle's button. He paused at sight of Retief, looked him over momentarily, then advanced and held out his hand. Lots of skiing, bob-sledding, ice skating; and it's the season for woodworkers. Our furniture—" "I've seen some of your furniture," Retief said. Arapoulous puffed on his cigar, looked worriedly at Retief. Course, I'm only twenty-eight; I can't remember but two other harvests. "It sounds like I've been missing something," said Retief. Arapoulous put his bundle on the desk, pulled off the wrappings. Retief looked at the two squat bottles, one green, one amber, both dusty, with faded labels, and blackened corks secured by wire. Retief picked one up, sniffed the deep rust-colored fluid, tasted it, then took a healthy swallow. "Don't try to describe it, Mr. Retief," Arapoulous said. Retief put aside his cigar, pulled the wires loose, nudged the cork, caught it as it popped up. There's prizes for the biggest day's output, bets on who can fill the most baskets in an hour.... Come nightfall, the tables are set up in the garden plots, and the feast is laid on: roast turkeys, beef, hams, all kinds of fowl.
output:  Because the order of tractors is unusually large.
options:  Because he knows whoever ordered the tractors has bad intentions.  Because he knows the order is a mistake.  Because the order of tractors is unusually large.  Because no one else appears to be concerned about the tractors.