Questions: The Federal Trade Commission, Consumer Financial Protection Bureau, FDA US Department of Justice enforce: - all laws - federal consumer protection laws - antitrust laws - tax laws

The answer is: federal consumer protection laws.

Explanation for each option:

1. All laws: This is incorrect. These agencies do not enforce all laws. Each agency has a specific mandate and jurisdiction.

2. Federal consumer protection laws: This is correct. The Federal Trade Commission (FTC), Consumer Financial Protection Bureau (CFPB), Food and Drug Administration (FDA), and the US Department of Justice (DOJ) are all involved in enforcing various federal consumer protection laws. For example, the FTC enforces laws against deceptive advertising, the CFPB oversees financial products and services, the FDA regulates food and drug safety, and the DOJ can enforce consumer protection laws through litigation.

3. Antitrust laws: This is partially correct but not the best answer. While the FTC and DOJ do enforce antitrust laws, the CFPB and FDA do not. Therefore, this option does not encompass the full scope of the agencies mentioned.

4. Tax laws: This is incorrect. Tax laws are primarily enforced by the Internal Revenue Service (IRS), not by the FTC, CFPB, FDA, or DOJ.

In summary, the most accurate and comprehensive answer is that these agencies enforce federal consumer protection laws.