Online readers often ?nd only the information they want and ignore the rest

If stock prices follow a random walk, which of the following statement(s) is(are) correct?

A) successive stock price changes are not related B) Both successive stock price changes are not related and the history of stock prices cannot be used to predict future returns to investors C) the history of stock prices cannot be used to predict future returns to investors D) None of the choices are correct.

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Indicate whether the statement is true or false.