Final answer:
The passage challenges the claim that the question about the existence of intelligent life elsewhere in the universe must be made more precise in order to answer correctly.
Step-by-step explanation:
The argument in the given passage can most reasonably be interpreted as an objection to claim (C) The question about the existence of intelligent life elsewhere in the universe must be made more precise if we hope to answer it correctly. The passage argues that defining "intelligent life" in a more precise way would limit our ability to recognize new and unimagined possibilities of intelligent life. The author suggests that leaving our definitions open to new possibilities is necessary in order to find and recognize intelligent life elsewhere in the universe. Therefore, the passage challenges the claim that the question must be made more precise.