If the auditor believes that a misstatement is or might be intentional and the effect on the financial statements could be material or cannot be readily determined, the auditor should do which of the following?

A) Issue an unmodified opinion on the financial statements
B) Request additional information from management
C) Communicate the matter to those charged with governance and consider the need to modify the auditor's report
D) Ignore the misstatement unless it is clearly material