Stocks A, B, and C Are Similar in Some Respects

Stocks A, B, and C are similar in some respects: Each has an expected return of 10% and a standard deviation of 25%.Stocks A and B have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero.Stocks A and C have returns that are negatively correlated with one another; i.e., r is less than 0.Portfolio AB is a portfolio with half of its money invested in Stock A and half in Stock B.Portfolio AC is a portfolio with half of its money invested in Stock A and half invested in Stock C.Which of the following statements is CORRECT?

A) Portfolio AC has an expected return that is greater than 25%.
B) Portfolio AB has a standard deviation that is greater than 25%.
C) Portfolio AB has a standard deviation that is equal to 25%.
D) Portfolio AC has a standard deviation that is less than 25%.
E) Portfolio AC has an expected return that is less than 10%.