AU-C 300 Planning an Audit and AS 2101 Audit Planning primarily requires auditors to ()

A. Plan the audit by assessing risk to reduce audit risk to an acceptably low level.

B. Perform tests of the system of internal control, or tests of account balances, transactions or disclosures.

C. Make decisions about the extent and timing of detailed testing of account balances and transactions.

D. Rely on the client's system of internal controls.

(B is incorrect)