Which action would best counteract nutritional quackery encountered in an online ad?

• A. Immediately share the ad widely to expose it to more people who might buy the product and thereby strengthen its market position.
• B. Assume all online health ads are accurate because advertising is regulated strictly by scientific bodies.
• C. Verify the original research in peer-reviewed sources, check funding and conflicts of interest, and favor recommendations from credentialed professionals like RDNs rather than ad claims.
• D. Contact the ad author on social media and accept their personal testimonial as equivalent to peer-reviewed evidence.

Answer: (C)