Answer: Stimulating the aggregate demand in the economy.
Step-by-step explanation:
The American Recovery and Reinvestment Act was a Recovery act enacted by the Federal Government to help the United States come out of what became known as the Great Recession of 2008. It's purpose was to increase the Aggregate Demand in the Economy by preserving people's Jobs and creating new ones as well as investing in infrastructure and energy. It also gave out temporary relief to the unemployed.
This fresh injection of money into the Economy helped boost Aggregate Demand.