A Market Guru is on CNBC telling the world about the methodology she uses to select stocks. How should you evaluate this information?

A.. It is extremely valuable. Why else would she be on CNBC?

B. Worthless. It is a marketing ploy for her to get more clients.

C. Highly valuable because her prior returns were good.

D. Questionable value. It might have some value, but that value is lower now that everyone else knows it.