Question

How did the U.S. government promote domestic businesses and industries?

Answer 1

One of the main ways in which the U.S. government promoted domestic businesses and industries was by offering tax incentives to companies that chose to keep their firms on US territory :)

Answer 2

One of the main ways in which the U.S. government promoted domestic businesses and industries was by offering tax incentives to companies that chose to keep their firms on US territory.