An investor will choose between Asset Q with an expected return of 6.5% and a standard deviation of 4.3%, Asset U with an expected return of 8.8% and a standard deviation of 5.5%, and Asset B with an expected return of 8.8% and a standard deviation of 6.5%. Which one should she prefer?

A. Asset Q

B. Asset B

C. Asset U

D. cannot be determined