Assignment Score: 0.00% Save Submit Assignment for Grading MC.07.025 Question 9 of 12 . Check My Work Assume that interest rates on 20-year Treasury and corporate bonds with different ratings, all of which are noncallable, are as follows: NB FOT-bond = 7.72% A = 9.64% AAA = 8.72% BBB = 10.18% o The differences in rates among these issues were most probably caused primarily by: a. Infiation differences. b. Maturity risk differences. c. Real risk-free rate differences. d. Default risk and liquidity differences. e. Tax effects Check My Work A