卵巢囊肿的病理类型包括（）

A.卵泡囊肿

B.单纯性囊肿

C.黄体囊肿

D.黄素囊肿

E.巧克力囊肿

With respect to determining the optimal portfolio for an investor, which of the following statements is most accurate（）

A. Two investors may choose the same optimal portfolio even if their indifferent curve are different.

B. Less risk-averse investors will have steeper utility curves than more riskaverse investors.

C. The optimal portfolio lies at the point of tangency between the efficient frontier and indifference curve with the highest possible utility.