Exam IIA-CIA-Part1 topic 1 question 47 discussion

After several years in the engineering department, an engineer was transferred to the internal audit department. One month later, the new auditor was assigned to an assurance engagement for the engineering department. When the auditor's former engineering supervisor suggested a change in the sample selection method, the auditor consulted with the audit supervisor. They determined that the suggested method would not be as representative and that the original selection method should be used. In this situation, the auditor: