Which of the following is the reason why the regular pass-through securities are not very attractive to insurance companies and pension funds seeking long-term duration assets to match their long-term duration liabilities? Select one: O A. These bonds have the shortest average life with a maximum of prepayment protection. O B. Bondholders receive the promised coupon and principal payments but are not entitled to accrued interest payments. C. They have short expected duration. D. Their failures to offer prepayment protection. O E. They are zero coupon bonds and hence carry maximum amount of risk