These photographs indicate the people of China and the people of ancient Peru modified their environment 1) create effective trade routes
2) increase the amount of land available for agriculture
3) move large quantities of water into cities
4) provide an effective defense

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