A stock has an expected return of 12% and a standard deviation of 20%. Long-term Treasury bonds have an expected return of 9% and a standard deviation of 15%. Given this data, which of the following statements is correct?A. The two assets have the same coefficient of variation.B. The stock investment has a better risk-return trade-off.C. The bond investment has a better risk-return trade-off.D. Both investments have the same diversifiable risk