Final answer:
The tax cuts implemented by President George W. Bush, the supply-side economics policies of President Ronald Reagan, and the pro-business policies of the Republican-controlled Congress in the 1920s helped promote economic growth and prosperity.
Step-by-step explanation:
The policies of the three Republican Presidents that helped most to promote economic growth and prosperity were:
1.The tax cuts implemented by President George W. Bush in 2001, which aimed to spur investment by reducing tax rates across the board, especially for high-income individuals.
2.The supply-side economics policies of President Ronald Reagan, which included reducing government spending, lowering taxes, tightening the money supply, and reducing government regulation.
3.The pro-business policies of the Republican-controlled Congress and White House in the 1920s, which raised tariffs to protect US businesses, reduced tax rates for the wealthy, and reduced government spending.