input: Text: THE DESERT AND THE STARS BY KEITH LAUMER The Aga Kaga wanted peace—a piece of everything in sight! "I'm not at all sure," Under-Secretary Sternwheeler said, "that I fully understand the necessity for your... ah... absenting yourself from your post of duty, Mr. Retief. Surely this matter could have been dealt with in the usual way—assuming any action is necessary." "I had a sharp attack of writer's cramp, Mr. Secretary," Retief said. "So I thought I'd better come along in person—just to be sure I was positive of making my point." "Eh?" "Why, ah, there were a number of dispatches," Deputy Under-Secretary Magnan put in. "Unfortunately, this being end-of-the-fiscal-year time, we found ourselves quite inundated with reports. Reports, reports, reports—" "Not criticizing the reporting system, are you, Mr. Magnan?" the Under-Secretary barked. "Gracious, no," Magnan said. "I love reports." "It seems nobody's told the Aga Kagans about fiscal years," Retief said. "They're going right ahead with their program of land-grabbing on Flamme. So far, I've persuaded the Boyars that this is a matter for the Corps, and not to take matters into their own hands." The Under-Secretary nodded. "Quite right. Carry on along the same lines. Now, if there's nothing further—" "Thank you, Mr. Secretary," Magnan said, rising. "We certainly appreciate your guidance." "There is a little something further," said Retief, sitting solidly in his chair. "What's the Corps
  Question: How does the terraforming technology work?
  
   (A) It instantly transforms bare planets into planets that can support life
   (B) It infects organisms on the planet with a virus that changes their DNA to make them more suitable for human consumption
   (C) It can only work on land that has previously contained life
   (D) It follows ecological processes to slowly transform barren land into arable land over time
  Answer:
output: It follows ecological processes to slowly transform barren land into arable land over time