SKS Partners is managing an investment portfolio for its client. The portfolio has a beta of 1.4, the risk-free rate is 2.0%, and the required rate of return of the market portfolio equals 9.0%. If the portfolio's actual return were 12.5%, SKS Partners would:

A) under-perform by 0.7%

B) under-perform by 2.1%

C) over-perform by 0.7%

D) over-perform by 2.1%