input: Text: SPACEMAN ON A SPREE BY MACK REYNOLDS Illustrated by Nodel What's more important—Man's conquest of space, or one spaceman's life? I They gave him a gold watch. It was meant to be symbolical, of course. In the old tradition. It was in the way of an antique, being one of the timepieces made generations past in the Alpine area of Eur-Asia. Its quaintness lay in the fact that it was wound, not electronically by power-radio, but by the actual physical movements of the bearer, a free swinging rotor keeping the mainspring at a constant tension. They also had a banquet for him, complete with speeches by such bigwigs of the Department of Space Exploration as Academician Lofting Gubelin and Doctor Hans Girard-Perregaux. There was also somebody from the government who spoke, but he was one of those who were pseudo-elected and didn't know much about the field of space travel nor the significance of Seymour Pond's retirement. Si didn't bother to remember his name. He only wondered vaguely why the cloddy had turned up at all. In common with recipients of gold watches of a score of generations before him, Si Pond would have preferred something a bit more tangible in the way of reward, such as a few shares of Variable Basic to add to his portfolio. But that, he supposed, was asking too much. The fact of the matter was, Si knew that his retiring had set them back. They hadn't figured he had enough shares of Basic to see him through decently. Well, possibly he didn
  Question: Why is Si retirement so significant to the Space Exploration Team? 
  
   (A) There aren’t enough working people in the world. They won’t be able to find a replacement.
   (B) As one of two remaining spacemen, it would likely mean the defunding and shut down of the Space Exploration Team.
   (C) Training new spacemen is costly and time consuming. They won’t have anyone else ready after him.
   (D) His retirement may inspire others to stop working as well, which would be hugely detrimental as most people don't feel the drive to work as is.  
  Answer:
output: Training new spacemen is costly and time consuming. They won’t have anyone else ready after him.