Answer: Aggregate Demand Decreases
Step-by-step explanation:
When the Central Bank sells bonds, it is engaging in Open Market Operations to reduce the amount of money in the Economy by taking money out of people's hands ( the money they will use to buy the bonds).
When money supply in the economy decreases, it will have the opposite effect on Interest rates as they will increase because money is no longer readily available.
When this happens both businesses and Individuals will reduce the amount of money they borrow for investment and consumption respectively which are both components of Aggregate Demand.
Aggregate Demand therefore decreases and the AD curve shifts to the LEFT to depict this.