Answer:
A. Increase investment in long-term bonds
Explanation:
According to the Expectations hypothesis which is based on the principle that long-term rate is determined purely by current and future expected short-term rates, such that he expected final value from the accumulation of progression of short-term bonds approximates the final value from investing in long-term bonds.
Hence, given that when the interest rates fall, the prices of the bonds on the market already will rise, then it can be concluded that If the fund manager thinks that interest rates are going to fall, she should Increase investment in long-term bonds