Why did europe not play a large role in the african slave trade before the 1400s?

a. europeans did not travel to africa until the 15th century.
b. the feudal system prevented europeans from trading with africans.
c. slavery was outlawed by the catholic church at the time.
d. peasants provided european leaders with enough labor.

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period? if there should be a waiting period, explain why.

Why was the u.s. annexation of hawaii delayed until william mckinley became president? a: the rebels who overthrew queen liliuokalani opposed u.s. annexation. b: the senate did not approve the treaty of annexation until mckinley entered the white house. c: supporters of the nationalist cause were in the majority in hawaii until 1898. d: mckinley’s predecessor, grover cleveland, refused to sign the treaty of annexation.

The success of the civil rights movement of the 1950s largely bypassed ?