People Who Use Self-Help Materials Often Don't Experience the Successes

People who use self-help materials often don't experience the successes that the books promise. This often leads the users of self-help materials to

A) be even more likely to seek professional help for their problems.
B) be even less likely to seek professional help for their problems.
C) warn their friends about the downside of anecdotal evidence.
D) demand more rigorous evidence of self-help program effectiveness in the future.