Which of the following are true statements regarding client acceptance and continuance?

A. If any threats to independence are identified, that auditor should not accept the engagement.

B. An engagement letter should be issued every year.

C. The auditor only needs to assess independence for new engagements.

D. The independence requirement is met if the auditor does not own shares of the client.

E. Once the client signs the engagement letter, the client cannot sue the auditor.

F. If the client does not allow the new auditor to contact the predecessor auditor, it should not impact client acceptance.