A Stock's Average Return Is 10 Percent

A stock's average return is 10 percent. The average risk-free rate is 7 percent. The standard deviation of the stock's return is 4 percent, and the stock's beta is 1.5. What is the Treynor Index for the stock?

A) .03
B) .75
C) 1.33
D) .02
E) 50