Your stock portfolio has an expected return of 12% and T-bills have an expected return of 4%. If you want to reduce your risk by adding T-bills to your stock portfolio but you dont want to go below a 10% expected return, what percentage of your money must you put in T-bills?

a. 50.00%

b. 16.67%

c. 25.00%

d. 83.33%

e. 75.00%