You have invested 20% of your money in Microsoft, 45% in GM, and the rest in Walmart. Walmart has an expected return of 14%, and the expected returns of Microsoft and GM are 12.65% and 3.12%, respectively. What is the expected return of your portfolio?

A. 7.58%

B. 8.83%

C. 9.56%

D. 10.00%

E. 12.34%