Why does the author mention the United States in the fourth sentence?

How does the process of constructing a historical narrative differ from the process of creating a timeline

What do u think caused the size of the roman empire to change

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