To prevent a fall in Aggregate Demand, the government can implement expansionary fiscal policies, such as:
1. Decreasing tax rates:
- Lower taxes increase disposable income, encouraging higher consumption and investment, thereby increasing Aggregate Demand.
2. Increasing government spending:
- More public expenditure stimulates demand, creating jobs and boosting the economy.
Conclusion:
Since reducing tax rates increases Aggregate Demand, option (D) is correct.