In the Alfred Hitchcock Presents Episode "Mail Order Prophet," a Man

In the Alfred Hitchcock Presents episode "Mail Order Prophet," a man receives mysterious letters that accurately predict the movements of certain stocks. After being correct several times in a row, the man, upon the letter's request, sends money to the market prophet in exchange for his latest stock tip. At the end of the episode we learn the "prophet" is actually a con man who sends a letter to many people with half the letters predicting a stock will increase and the other half predicting it will decrease. How does this Hitchcock episode illustrate one particular theory of Warren Buffet's wealth?

A) It was very difficult to send out all those letters; hard work pays off.
B) Like the letters in the story, Buffet happened to be right several times in a row.
C) Buffet conned his way to the top, using insider information to become wealthy.
D) Diversification is an important way to protect investments and build wealth.