QUESTIONS Some of a portfolio consists of stock A, which has an expected return of 18.6% and a standard deviation of retums of 27.14, and the rest of the portfolio consists of stock B, which has an expected return of 18.6% and a standard deviation of returns of 27.1%. If the returns of stock and stock B do not move perfectly together in the same direction by the same relative amount, then which one of the following assertions is true? Assume that the portfolio has at least some stock A and some stock B. a. The expected return of the portfolio is not 18.6% and the standard deviation of the portfolio is not 27.1% b. The expected return of the portfolio is not 18.6% and the standard deviation of the portfolio is 27.1% c. The expected return of the portfolio is 18.68 and the standard deviation of the portfolio is not 27.1% d. The expected return of the portfolio is 18.6% and the standard deviation of the portfolio is 27.14 e. The question cannot be answered without more specific information on how much of the portfolio consists of stock and how much consists of stock