Answer: C. letter A and letter B
Explanation:
True the us was not a major global power until the end of ww1
The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.
The Greensboro Sit-In was a critical turning point in black history and American history, bringing the fight for civil rights to the national stage. Its use of nonviolence inspired the Freedom Riders and others to take up the cause of integration in the South, furthering the cause of equal rights in the United States.
