18. Which of the following best describes the performance of professionally managed equity funds? A. Outperform the S&P 500 index on both raw and risk-adjusted return measures - B. Underperform the S&P 500 index on both raw and risk-adjusted return measures C. Outperform the S&P 500 index on raw return measures and underperform the S&P 500 index on risk-adjusted return measures D. Underperform the S&P 500 index on raw return measures and outperform the S&P 500 index on risk-adjusted return measures E. Match the performance of the S&P 500 index on both raw and risk- adjusted return measures