Which of the Following Is Correct About the PCAOB

Which of the following is correct about the PCAOB?

A) The PCAOB receives its authority from U.S.Federal Law
B) Auditing standards issued by the PCAOB must be approved by the U.S.Congress
C) Anyone who wants to purchase stock on a U.S.stock exchange must follow the rules of the SEC
D) All audit firms performing audits of public companies are registered with and agree to comply with the auditing procedures established by the PCAOB