Gretta's portfolio consists of $700,000 invested in a stock that has a beta of 1.2 and $300,000 invested in a stock that has a beta of 0.8 . The risk-free rate is 6% and the market risk premium is 5%. Which of the following statements is CORRECT?

a. The required return on the market is 10%.
b. The portfolio's required return is less than 11%.
c. If the risk-free rate remains unchanged but the market risk premium increases by 2%, Gretta's portfolio's required return will increase by more than 2%.
d. If the market risk premium remains unchanged but expected inflation increases by 2%, Gretta's portfolio's required return will increase by more than 2%.
e. If the stock market is efficient, Gretta's portfolio's expected return should equal the expected return on the market, which is 11%.

c