Which economic theory advocated by Ronald Reagan suggests that tax breaks for the wealthy would benefit the economy as a whole?

The correct choice acknowledges the concept commonly referred to as "trickle-down economics." This theory, associated with Ronald Reagan's administration, posits that providing tax breaks and incentives to the wealthy and businesses can lead to investments in the economy. As these individuals and businesses accumulate wealth, it is believed that they will spend and invest more, ultimately stimulating economic growth. This growth is expected to "trickle down" to lower-income individuals through job creation, wage increases, and improved economic conditions.

While supply-side economics broadly explains the idea that lower taxes can enhance overall economic productivity, "trickle-down economics" specifically emphasizes the cascading effect of wealth distribution from the top of the economic scale to the lower tiers. Keynesian economics, on the other hand, focuses on increased government expenditures and lower taxes to stimulate demand, while market economics refers to the dynamics of supply and demand without central planning. Therefore, "trickle-down economics" most accurately encapsulates the theory that tax breaks for the wealthy are advantageous for the entire economy.