Suppose that you regress the annual returns of a long-term bond portfolio on last year's default spread (in basis points) and obtain an intercept of -0.345 and a slope of 0.004 both of which are statistically significant. What is the expected return on the bond portfolio if the current default spread is 100? O A. 1.5% B. 5.5% O C. 15.5% O D. 12.0%