Which one of the following portfolios cannot lie on the efficient frontier as described by Markowitz? Portfolio Expected Return Standard Deviation A 11% 20% B 7% 6% 17% 35% 14% 14% Only portfolio A cannot lie on the efficient frontier. Only portfolio B cannot lie on the efficient frontier. Only portfolio C cannot lie on the efficient frontier. Only portfolio D cannot lie on the efficient frontier. All four portfolios can lie on the efficient frontier