Answer:
I would say: C.) Baltimore was blockaded by the Union Navy.
Explanation:
I really don't know but i'm taking a guess. Tell me if i was right or wrong.
In the late 1800's people in many parts of the world decided to leave their homes and immigrated to the United States
Because the English economy improved drastically. Political and religious conflict was diminished. So everyone stayed there.
yes because how would a historian most likely use this map is number 2
