Answer: d. decrease the market price
Step-by-step explanation:
Interest rates and the prices of bonds are negatively correlated as one increasing means that the other is decreasing.
The reason is this: when market interest rates rise, investors will move away from bonds to other investments because bonds offer a fixed payment and so will be less attractive than other investments which would be offering higher returns based on the higher market rates.
The drop in demand for bonds will lead to their prices falling as per the rules of demand and supply.