Help me with 9 and 10 please

9. The motivation for the creation of different types of structures in a secu ritization is: A to eliminate prepayment risk and credit risk for all of the tranches B. to eliminate credit risk for all of the tranches C. to redistribute prepayment risk and credit risk efficiently among different tranches O. to reduce the amount of servicing fees charged to the special purpose vehicle E. to improve the credit rating of the entire special purpose vehicle 10. In a securitization structure, time tranching provides investors with the ability to choose between: A. fully amortizing loans and partially amortizing loans B. high credit quality loans and low credit quality loans C. extension risk and contraction risk D. senior bonds and subordinated bonds E. duration tranches and convexity tranches 11 Inhn Gtet