What contributed to the efficient system of communication that was crucial to sustaining the persian empire?

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies

What are some american advantages that led to victory in the revolutionary war?

What do the differing approaches of booker t. washington and w.e.b du bois suggest about their views of american society?