Among the Clues That a Health Product Claim Is Fraudulent

Among the clues that a health product claim is fraudulent is a ____.

A)  ​notice that the product is available from multiple sources 
B)  ​documented case history of past successes 
C)  ​reminder that the product is only effective for a specific ailment 
D)  ​web site that fails to list a contact telephone number 
E)  ​web site that lists more than one telephone number