Midwest Investment Consultants (MIC) operates several stock investment portfolios that are used by firms for investment of pension plan assets. Last year, one portfolio had a realized return of 12.6 percent and a beta coefficient of 1.15. The average T-bond rate was 7 percent and the realized rate of return on the S&P 500 was 12 percent. What was the portfolio's alpha?
a. -0.75%
b. -0.15%
c. 0%
d. 0.15%
e. 0.75%