The main difference between SAS and AU is:

A) they are the same except that SAS are organized chronologically and the AU are organized by topical area.

B) SAS are issued by the ASB and AU are issued by the PCAOB.

C) SAS are issued by the PCAOB and AU are issued by the ASB.

D) SAS define minimum standards of performance for auditors while AU define financial accounting principles that must be followed according to GAAP.

Please explain your answer