Which action constitutes tampering with a consumer product?

• A. Giving a free product to a friend
• B. Repackaging for sale with proper labeling
• C. Altering or adding a foreign substance to the product
• D. Reporting a defect to the manufacturer

Answer: (C)

Tampering means deliberately changing a product in a way that could affect its safety or integrity. Altering or adding a foreign substance to the product fits this because it changes what the consumer receives and can introduce harm or contamination. The other actions do not involve modifying the product itself: giving a product to a friend is just distributing it; repackaging for sale with proper labeling is a legitimate handling/redistribution activity when done correctly; reporting a defect to the manufacturer is a safety action that helps fix problems rather than compromise the product.