Which of the following statements about the performance of hedge fund are correct:（ ） A. The Barclays Hedge Fund Index shows that hedge funds outperformed the market in 2008, but not between 2009 and 2016 B. Many hedge fund strategies have high betas and therefore cannot be expected to outperform the market when it is doing well C. The statistics may bias average hedge fund performance upward because only hedge funds that choose to report their returns are included in the statistics and these tend to be the hedge funds that are doing well D. The Barclays Hedge Fund Index shows that hedge funds underperformed the market in 2008