Your retirement portfolio comprises 100 shares of the Standard \& Poor's 500 fund (SPY) and 100 shares of iShares Barclays Aggregate Bond Fund (AGG). The price of SPY is $123 and that of AGG is $99. If you expect the return on SPY to be 11% in the next year and the return on AGG to be 6%, what is the expected return for your retirement portfolio? A. 7.89% B. 10.09% C. 7.45% D. 8.77%