input: Text: THE LONG REMEMBERED THUNDER BY KEITH LAUMER He was as ancient as time—and as strange as his own frightful battle against incredible odds! I In his room at the Elsby Commercial Hotel, Tremaine opened his luggage and took out a small tool kit, used a screwdriver to remove the bottom cover plate from the telephone. He inserted a tiny aluminum cylinder, crimped wires and replaced the cover. Then he dialed a long-distance Washington number and waited half a minute for the connection. "Fred, Tremaine here. Put the buzzer on." A thin hum sounded on the wire as the scrambler went into operation. "Okay, can you read me all right? I'm set up in Elsby. Grammond's boys are supposed to keep me informed. Meantime, I'm not sitting in this damned room crouched over a dial. I'll be out and around for the rest of the afternoon." "I want to see results," the thin voice came back over the filtered hum of the jamming device. "You spent a week with Grammond—I can't wait another. I don't mind telling you certain quarters are pressing me." "Fred, when will you learn to sit on your news breaks until you've got some answers to go with the questions?" "I'm an appointive official," Fred said sharply. "But never mind that. This fellow Margrave—General Margrave. Project Officer for the hyperwave program—he's been on my neck day and night. I can't say I blame him. An unauthorized transmitter interfering with a Top Secret project, progress slowing to a halt, and this
  Question: Which best summarizes this story?
  
   (A) A private investigator tries to find a transmitter which allows him to save his hometown from certain danger.
   (B) An investigator travels to his hometown to find conflict between the transmitter-using youth and the local and state police forces.
   (C) An investigator travels to his hometown to locate a transmitter with an unknown use.
   (D) A man seeks justice for a town plagued by a harmful transmitter.
  Answer:
output: An investigator travels to his hometown to locate a transmitter with an unknown use.