First president of the third republic

Amain reason most irish immigrants came to the united states in the mid-1800s wasa) to find jobs as skilled workers.b) to escape a potato famine.c) to live in less-crowded conditions.d) to escape religious persecution.

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

Why did jefferson make the louisiana purchase?