i think it's answer is option A
first, the challenge response authentication is basically a knowledge of secret value and you can connect it with a entity authentication. The simplest example of a challenge–response protocol is password authentication, where the challenge is asking for the password and the valid response is the correct password.
the claimant(the claimant authenticates to a system or application over a network. The claimant had to be actually working when they claim.) proves that she knows a secret without actually sending it to the entity.