There are 2 bonds in the portfolio. Their current prices, interest rates, and durations are listed below. What is the change in the portfolio value due to a 1% drop in the interest rate? Bond A B Market price 1100 500 Interest rate 7% 5% Duration (year) 6 4 Select one: ho a. An increase of $80.85 b. A decrease of $78.12 c. A decrease of $82.22 @d. An increase of $84.44 Clear my choice