Hey I need help this is due in 15 minutes

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

Who was at the top of the feudal system hierarchy

How did the us change it’s economy to provide supplies for the war effort?