CPAs may provide bookkeeping services to their private company audit clients, but there are a number of conditions that must be met if the auditor is to maintain independence. Which of the following conditions is not necessary?

A、The CPA must not assume a management role or function.
B、The client must hire an external CPA to approve all of the journal entries prepared by the auditor.
C、The auditor must comply with GAAS when auditing work prepared by his/her firm.
D、The client must accept responsibility for the financial statements.