How many audits of public companies per year does a CPA firm that is registered with the Public Company Accounting Oversight Board (PCAOB) have to perform in order to to be subject to mandatory annual inspection by the PCAOB?
Choice "C" is correct. The Sarbanes-Oxley Act requires the PCAOB to perform an annual inspection of each registered public accounting firm that regularly provides audit reports for more than 100 issuers.
