单选题
An investor is evaluating the following possible portfolios. Which of the following portfolios would not lie on the efficient frontier?
【正确答案】
C
【答案解析】Portfolio B cannot lie on the frontier because its risk is higher than that of Portfolio A's with lower return. Portfolio C cannot lie on the frontier because it has higher risk than Portfolio D with lower return. Portfolio F cannot lie on the frontier cannot lie on the frontier because its risk is higher than Portfolio D.