After the civil war, newly-freed african americans had to
a. find a way to make money.
b. apply for us citizenship.
c. perform military service.
d. relocate to the north.

The correct option would be (a) find a way to make money.

Explanation:

The newly-freed African Americans had to face many hurdles after the civil war, among them, poverty was considered to be the most severe!

Even though slavery was ended but the prejudice against the African Americans still remained in the hearts of the people due to which it was really difficult to find work and earn money.

The majority of the African Americans were living a life of poverty and hardships. Some of them even went back to their former owners for the slavery!

Bonus:

African Americans were given freedom from slavery through Thirteenth Amendment in 1865.

African Americans were given the American citizenship through Fourteenth Amendment in 1868.

African Americans were given the right to vote through Fifteenth Amendment in 1870.

c. the dred scott v. sandford case,

the answer is prolly b