input: Text: THE BIG HEADACHE BY JIM HARMON What's the principal cause of headaches? Why, having a head, of course! I "Do you think we'll have to use force on Macklin to get him to cooperate in the experiment?" Ferris asked eagerly. "How are you going to go about forcing him, Doctor?" Mitchell inquired. "He outweighs you by fifty pounds and you needn't look to me for help against that repatriated fullback." Ferris fingered the collar of his starched lab smock. "Guess I got carried away for a moment. But Macklin is exactly what we need for a quick, dramatic test. We've had it if he turns us down." "I know," Mitchell said, exhaling deeply. "Somehow the men with the money just can't seem to understand basic research. Who would have financed a study of cyclic periods of the hedgehog? Yet the information gained from that study is vital in cancer research." "When we prove our results that should be of enough practical value for anyone. But those crummy trustees didn't even leave us enough for a field test." Ferris scrubbed his thin hand over the bony ridge of his forehead. "I've been worrying so much about this I've got the ancestor of all headaches." Mitchell's blue eyes narrowed and his boyish face took on an expression of demonic intensity. "Ferris, would you consider—?" "No!" the smaller man yelled. "You can't expect me to violate professional ethics and test my own discovery on myself." " Our discovery," Mitchell said politely. "That's what I meant to say. But I'm not sure it would be completely ethical with
  Question: Why do they want Macklin specifically to be the test subject?
  
   (A) As a fellow scientist, he'd understand and appreciate what they're doing. 
   (B) He's in relatively good health, meaning he'd survive the experiment and yield resutls. 
   (C) He is a man of great importance, and people will believe him if it works. 
   (D) He has chronic migraines, making him a good candidate.
  Answer:
output: He is a man of great importance, and people will believe him if it works.