Rainsford's response to Zaroff indicates that A. he is opposed to the idea of hunting humans B. he does not understand that Zaroff is hunting humans C. he will soon be joining Zaroff in the hunt for humans D. he thinks Zaroff has the right to hunt humans.

Rainsford’s response to Zaroff indicates that: A. he is opposed to the idea of hunting humans

From the conversation between Rainsford and Zaroff, we can conclude that even though Rainsford loves hunting, he considered hunting humans being is considered a murder and he thought that Zaroff is losing his mind for even mentioning it.