Answer:
D. That economic growth can be boosted by "juicing demand, such as with tax cuts or spending increases"
Step-by-step explanation:
Supply-side economics represents the theory in which the tax would be cut for the rich population for an economy this would rise the savings and the investment capacity.
The other options would be considered incorrect as the supply side of the economy would not be the partiality of money. The rise in the labor productivity rise the aggregate demand and at the time when there is a rise in the aggregate demand so the natural rate of unemployment would decline also it does not represent the supply side