A bank has an average asset duration of 5 years and an average liability duration of 3 years. This bank has total assets of $500 million and total liabilities of $250 million. Currently, market interest rates are 10 percent. If interest rates fall to 8 percent, what is this bank's change in net worth?
A) Net worth will decrease by $31.81 million
B) Net worth will increase by $31.81 million
C) Net worth will increase by $27.27 million
D) Net worth will decrease by $27.27 million
E) Net worth will not change at all