Which of the following statements is correct? a. a portfolio that consists of 40 stocks that are not highly correlated with 'the market' will probably be less risky than a portfolio of 40 stocks that are highly correlated with the market, assuming the stocks all have the same standard deviations. b. a two-stock portfolio will always have a lower beta than a one-stock portfolio. c. if portfolios are formed by randomly selecting stocks, a 10-stock portfolio will always have a lower beta than a one-stock portfolio. d. a stock with an above-average standard deviation must also have an above-average beta. e. a two-stock portfolio will always have a lower standard deviation than a one-stock portfolio.