Final answer:
The principle that may reduce or eliminate auditor liability to a client is client contributory negligence. The correct answer is C.
Step-by-step explanation:
Client contributory negligence.
Contributory negligence is a legal defense that may reduce or eliminate the liability of an auditor to a client. It occurs when the client's actions or negligence contribute to the harm or damages they have suffered.
For example, if a client fails to provide necessary information or does not follow established accounting procedures, their contributory negligence may limit the auditor's liability in case of errors or financial losses.