Choice "D" is correct. PCAOB standards surrounding internal control apply only to audits of issuers.
Choices "c" and "b" are incorrect. PCAOB standards surrounding internal control apply only to audits of issuers, not to audits of nonissuers.
Choice "a" is incorrect. The PCAOB has issued Auditing Standards No. 5, requiring auditors of issuers to report on internal control.
