If a fund has a fixed portfolio of municipal bonds with long maturities, how will substantial changes in general interest rates affect the fund's portfolio?
A) The current value will fluctuate significantly, but the investment income will remain relatively unchanged.
B) The current value will not change, but the investment income will fluctuate significantly.
C) Both the income and the current value will fluctuate significantly.
D) Both the income and the current value will remain unchanged.
Answer: A) The current value will fluctuate significantly, but the investment income will remain relatively unchanged.