Which change in the law regulates the retail sales of pseudoephedrine?

The correct answer is B. The Combat Methamphetamine Epidemic Act (2005).

This law was enacted to combat the illegal production of methamphetamine by regulating the retail sale of pseudoephedrine, a common ingredient in cold medications. It requires consumers to show identification and limits the quantity that can be purchased in a given period, thus aiming to prevent the misuse of pseudoephedrine in methamphetamine production. If you have more questions or need further assistance, feel free to ask!