97. Video: Which of the following is not true about the S\&P index funds? a. All S\&P 500 index funds are well-diversified. b. S\&P 500 index funds tend to trade (i.e., buy and sell stocks) less actively than actively managed funds that invest in many of the same stocks. c. All S\&P 500 index funds charge low fees. d. Ignoring fees, all S\&P 500 index funds earn nearly the same return each year