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

$$124$ and that of AGG is $$99.$ If you expect the return on SPY to be $10\%$ in the next year and the return on AGG to be $5\%,$ what is the expected return for your

retirement portfolio?

A$.7\%$

B$.8\mathrm{.}95\%$

C$.6\mathrm{.}61\%$

D$.7\mathrm{.}78\%$