correct answer?

The average excess return on a portfolio is 15.0% and the risk- free rate of return is 3.6%. The covariance between returns on the portfolio and returns on the market is 0.024732 and the variance of returns on the market is 0.018225. What is the portfolio's Treynor ratio? Select one: a. 0.64 b. 0.08 C. 0.11 d. -0.45