Internal control systems are:.
A. Required by Sarbanes-Oxley (SOX) to be documented and certified if the company's stock is traded on an exchange (a public company).
B. Required only if a company plans to engage in interstate commerce.
C. Developed by the Securities and Exchange Commission for public companies.
D. Developed by the Internal Revenue Service for all U. S. companies.
E. Developed by the Small Business Administration for non-public companies.

Internal control system are required by Sarbanes-Oxley (SOX) to be documented and certified if the company's stock is traded on an exchange (a public company).

Explanation:

Internal controls are the procedures mechanisms and rules implemented by a business to ensure the integrity of its accounting and financial information, promote accountability, and also prevent fraud.

Besides complying with regulations and law and hindering employees from commiting fraud or stealing assets, internal controls can improve operational efficiency through the improvement in the timeliness and accuracy of financial reporting.

Internal controls are a vital business function for every company in the United States since the accounting scandals that occurred in the early 2000s. The Sarbanes Act of 2002 was to improve accuracy of corporate disclosures and protect investors from fraudulent activities.

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