NO.PZ2023021601000019
问题如下：
The point of tangency between the capital allocation line (CAL) and the efficient frontier of risky assets most likely identifies the: (mock)
选项：
A.global minimum-variance portfolio.
B.optimal risky portfolio.
C.optimal investor portfolio.
解释：
The optimal risky portfolio lies at the point of tangency between the capital allocation line and the efficient frontier of risky assets.b和c这两条线能画图看看么？
