Which of the following is a behavior inconsistent with the Efficient Markets Hypothesis?

Question

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The Efficient Markets Hypothesis states that all available information is reflected in a security's current price, and therefore it is impossible to consistently achieve returns above the market average through any strategy, including holding onto losing stocks. Choosing to hold onto a losing stock contradicts this theory by assuming that the stock's price will eventually rebound, which suggests that the market is not perfectly efficient. Choices A, B, and D are all consistent with the Efficient Markets Hypothesis, as diversification reduces risk without attempting to outperform the market, avoiding active trading reduces transaction costs and taxes, and investing in a stock index fund tracks the overall market return.

Which of the Following Is a Behavior Inconsistent with the Efficient