Comprehensive and Detailed Step-by-Step Explanation:
* Reference to the IIA Code of Ethics - Confidentiality:
* The principle of confidentiality requires internal auditors to respect and protect the value of information obtained during the course of their work and to avoid using it for personal gain.
* Reasoning:
* Option Ais correct because refusing to use audit information for personal financial gain directly aligns with the principle of confidentiality.
* Option Brelates to competency and professional judgment, not confidentiality.
* Option Cpertains to avoiding conflicts of interest, which is an example of the principle of objectivity.
* Application of Confidentiality:
* Internal auditors must safeguard sensitive information and use it solely for legitimate audit purposes.