Which One of the Following Statements Is Correct About a Portfolio

Which one of the following statements is correct about a portfolio that is invested 30% in stock A, 40% in stock B, and 30% in stock C?

A) The expected return on the portfolio is equal to the summation of the returns on the individual securities within the portfolio divided by three.
B) The standard deviation of the portfolio is equal to the summation of the weights of each security multiplied by the standard deviation of each respective security.
C) The expected return on the portfolio is equal to the portfolio beta times the weighted average of the expected returns of each of the individual securities in the portfolio.
D) The standard deviation of the portfolio is equal to the square root of the summation of the individual security variances.
E) The expected return of the portfolio is equal to the risk free rate of return plus a risk premium based on a weighted average of the betas of the individual securities and the market risk premium.