Which of the following is correct with respect to diversification? A) Investing in 2 or 3 large stocks will eliminate all of the idiosyncratic risk. B) Investing in 3 companies all within the same...

Which of the following is correct with respect to diversification?
A) Investing in 2 or 3 large stocks will eliminate all of the idiosyncratic risk.
B) Investing in 3 companies all within the same industry will reduce most of the systematic risk.
C) Investing across many diverse assets will eliminate all of the systematic risk.
D) Investing across many diverse assets will eliminate some of the total risk.