While Performing an Internal Audit, an Auditor Notices That an Operator

While performing an internal audit, an auditor notices that an operator on one shift skips part of the documented procedure. In this situation, the auditor should do which of the following?

A) Make a note on the checklist and initial it.
B) Report it to the operator's supervisor or manager.
C) Question the operator about the observation.
D) Ask another operator to evaluate the situation.