An organization has recently acquired and implemented intelligent-agent software for granting loans to customers. During the post-implementation review, which of the following would be the KEY procedure for the IS auditor to perform? 

Answer options:

A. Review input and output control reports to verify the accuracy of the system decisions.
B. Review system documentation to ensure completeness.
C. Ensure that a detection system designed to verify transaction accuracy is included.
D. Review signed approvals to ensure responsibilities for decisions of the system are well-defined.

A