Rearden Metal has a bond issue outstanding with ten years to maturity, a yield to maturity of 8.6%, and a B rating. The corresponding risk-free rate is 3% and the market risk premium is 6%. Assuming a normal economy, the expected return on Rearden Metal's debt is closest to:______

a. 0.6%
b. 1.6%
c. 4.6%
d. 6.0%