Diversifying into hedge funds: Select one: O a. one can invest into funds of hedge funds (FOHFs). However, FoHFs seem over-diversified and the investor essentially has to pay a double layer of fees O b. One needs a lot of hedge funds into his portfolio to achieve proper diversification oc. Naive diversification is worse for He than Markowitz optimisation. O d. one can invest into funds of hedge funds (FoHFs). However, FoHis seem under- diversified