The expected return on a portfolio a. __________________ a weighted average of the expected returns on the stocks in the portfolio. The standard deviation on a portfolio b. __________________ a weighted average of the standard deviations on the stocks in the portfolio. (Select one of the capital letters that corresponds to your answer. For example, by answering A, you are selecting 'is less than or equal to' for a in the above sentence and you are selecting equals for b in the above sentence. Please ask me if do not understand how to answer). A. a. is less than or equal to b. equals B. a. is less than or equal to b. is greater than or equal to C. a. is greater than or equal to b. is greater than or equal to D. a. is greater than or equal to b. equals E. a. equals b. is less than or equal to