Use the Data Provided on Cadbury to Answer the Question

Use the data provided on Cadbury to answer the question below.The risk free rate is 4.25%.The expected return on the market portfolio is 9.75%.The corporate tax rate is 40%.The face value of Cadbury's outstanding bonds is 2.450 billion pounds sterling.The coupon rate on Cadbury's bonds is 4.5%.Assume that the bonds pay annual coupons.The yield to maturity on Cadbury's bonds is 4.5%.Cadbury's bonds mature in 7 years.Cadbury has 1.650 billion common shares outstanding.The market price of Cadbury's common shares as of Dec 31,2008 is 6.25 pounds sterling.Cadbury's Beta is 0.8.What is Cadbury's cost of debt (after-tax) ?

A) 2.70%
B) 4.50%
C) 7.80%
D) 8.65%
E) 8.70%