单选题 Which of the following statements regarding the Markowitz efficient frontier is least likely to be correct? The optimal portfolio for:

A. a more risk-averse inverse investor will lie inside the efficient frontier but will lie outside the efficient frontier for a less risk-averse investor.
B. an investor is the portfolio that lies on the efficient frontier and provides her with the greatest level utility.
C. an investor is found at the point of tangency between the efficient frontier and an investor's highest utility curve.

【正确答案】 A

【答案解析】The optimal portfolio will be different for investor with different levels of risk aversion, yet it will always lie on the efficient frontier, not inside or outside the curve.