In a particular economy, with investing and borrowing at the risk-free rate permitted, the expected return on the market portfolio is 13%. A rational, risk-averse investor wishing to achieve an expected return of 11% will invest in which of the following? A lending portfolio on the capital market line b. A portfolio on the mean variance efficient (upper) portion of the Markowitz frontier C. The global minimum variance portfolio d. A borrowing portfolio on the capital market line