Why did America finally decide to enter WW1

Rivalries between european imperialist powers and the growth of european militaries contributed to which outcome in the early 20th century? o a. many european powers were eager to go to war with one another. o b. european states became less concerned about controlling overseas empires. o c. small countries became more willing to join powerful empires. o d. the alliance system that maintained a balance of power in europe broke down.

The sahel is located on the edge of the sahara desert. a. north b. west c. south d. east

How w. e.b. dubois wanted to improve the social and economic situation that existed for african americans during the early 19th century?