Which of these statements is correct?

A. Weak form efficient market hypothesis implies it would be very difficult to beat the market by asking your friend at JP Morgan about unannounced merger deals he is working on

B. Semistrong market efficiency implies it would be very difficult to beat the market by reading the Financial Times

C. Strong market efficiency implies it would be very difficult to beat the market by studying old stock prices

D. None of the other answers are correct