Which of the Following Is NOT a Correct Statement

Which of the following is NOT a correct statement?

A) Of all the combinations of available securities, the minimum variance portfolio is a portfolio that lies on the efficient frontier and has the minimum amount of portfolio risk.
B) Efficient portfolios are those portfolios that offer the highest expected return for a given level of risk.
C) Investors prefer higher returns and lower risk, so if they are exposed to additional risk, they expect to be compensated for that additional exposure.
D) Portfolios on the lower segment of the minimum variance frontier dominate portfolios that lie above the minimum variance portfolio on the upper segment.