Which of the following statements is INCORRECT?

A: An auditor may serve on the board of directors of an audit client.

B: An auditor who is an immediate family member of the director of an audit client must not be assigned to the audit team.

C: Purchasing goods from an audit client on normal commercial terms does not create a threat to the auditors independenc

D: An auditor who was recently a director of an audit client must not be assigned to the audit team for that client.