Which of the following is correct? a. managed funds typically have a higher return than indexed funds. this tends to refute the efficient market hypothesis. b. managed funds typically have a higher return than indexed funds. this tends to support the efficient market hypothesis. c. index funds typically have a higher rate of return than managed funds. this tends to refute the efficient market hypothesis. d. index funds typically have a higher rate of return than managed funds. this tends to support the efficient market hypothesis.