Answer C is a claim the stimulus can serve as an objection to. The stimulus can be summed up as "we cannot make our definition of intelligent life more precise as it is likely the intelligent life we find will not fit those parameters and maybe limit our search range, making it less likely we find intelligent life." Therefore, answer C claiming it needs to be made more precise/narrowed to find intelligent life is at odds with the stimulus and the stimulus serves as an objection to that claim.
Comments
Answer C is a claim the stimulus can serve as an objection to. The stimulus can be summed up as "we cannot make our definition of intelligent life more precise as it is likely the intelligent life we find will not fit those parameters and maybe limit our search range, making it less likely we find intelligent life." Therefore, answer C claiming it needs to be made more precise/narrowed to find intelligent life is at odds with the stimulus and the stimulus serves as an objection to that claim.