What were some of the challenges that free African-Americans faced in the Northern states? Select all that apply.

pockets of slavery

abolitionism

extreme poverty

segregation

Segregation and extreme poverty were some of the challenges that freed African-Americans faced in the Northern states. It was the Southern states that had pockets of slavery still in existence, so that rules out that option. The other just doesn't make sense in the context.

The answer is:

segregation