input: Text: The Last Monster By GARDNER F. FOX Irgi was the last of his monster race, guardian of a dead planet, master of the secret of immortality. It was he whom the four men from Earth had to conquer to gain that secret—a tentacled monstrosity whom Earthly weapons could not touch. Irgi was the last of his race. There was no one else, now; there had been no others for hundreds and hundreds of years. Irgi had lost count of time dwelling alone amid the marble halls of the eon-ancient city, but he knew that much. There were no others. Only Irgi, alone. He moved now along the ebony flooring, past the white marble walls hung with golden drapes that never withered or shed their aurate luster in the opalescent mists that bathed the city in shimmering whiteness. They hung low, those wispy tendrils of mist, clasping everything in their clinging shelter, destroying dust and germs. Irgi had discovered the mist many years ago, when it was too late to save his kind. He had flung a vast globe of transparent metal above this greatest of the cities of the Urg and filled it with the mist, and in it he had stored the treasures of his people. From Bar Nomala, from Faryl, and from the far-off jungle city of Kreed had he brought the riches of the Urg and set them up. Irgi enjoyed beauty, and he enjoyed work. It was the combination of both that kept him sane. Toward a mighty bronze doorway he went, and as his body passed an invisible beam, the bronze portals slid apart, noiselessly, opening to reveal a vast circular chamber that hummed and throbbed, and was filled with a pale blue luminescence that glimmered upon metal rods and bars and ten tall cone
  Question: What did Irgi do to the men in the lab?
  
   (A) Vivisected them with rays
   (B) Prepared them for the chamber
   (C) Burned them with fire
   (D) Cut them with sharp lancets
  Answer:
output: Prepared them for the chamber