Which of the Following Statements Is True

Which of the following statements is true?

A) A person who uses a drink that contains vinegar as a cure for patients with lung cancer is practicing quackery.
B) According to scientific research,anecdotes that describe how nutrients benefit health are reliable sources of information.
C) In the United States,people can include "RD" after their name,even if they are not qualified to use the credential.
D) A disclaimer on a product's label provides proof that the product is likely to live up to the manufacturer's claims.