Question 24 1 pts Last year you created an immunized portfolio with an average maturity length of 14.5 years, a yield-to-maturity of 98 percentada duration of 9.6 years. According to the policy of dynamic immunization, this year you should now modify your portfolio in which one of the following ways? modity the vied-to-maturity to 9.1 percent - the portfolio so the duration becomes 8.6 years y the portfolose the average maturity becomes 13.5 years - the portfolio to the duration remains at 9.6 years the pork so the average maturity remains at 145 years