2) After careful analysis of previous stock prices, Tim discovers that he can consistently earn above-average returns if he buys oil-company stocks just before noon on any given trading day and then sell them immediately before the market closes that day. Which of the following describes this event? A) This contradicts only the weak form of market efficiency B) This contradicts only the semistrong form of market efficiency C) This contradicts only the strong form of market efficiency D) This is a violation of all forms of market efficiency