参考答案：C

解析：

Standard-setting bodies are professional organizations of accountants and auditors that establish financial reporting standards. Regulatory authorities are government agencies that have the legal authority to enforce compliance with financial reporting standards. Regulatory authorities, such as the Securities and Exchange Commission (SEC) in the U. S. and the Financial Services Authority (FSA) in the United Kingdom, are established by national governments. Most national authorities belong to the International Organization of Securities Commissions (IOSCO).