【单选题】Which of the following statements are correct with regard to the relationship between the audit plan and the audit strategy for an external audit engagement? ( )
A.
The audit plan should be developed before the audit strategy is established.
B.
The audit plan and the audit strategy should be established and developed at the same time.
C.
The overall audit strategy should be more detailed than the audit plan.
D.
The audit strategy should be established before the audit plan is developed.