What challenges did the United States face after the Civil War ended? Check all that apply.
The future of more than four million formerly enslaved people was unknown.
The industrial economy of the North was failing.
The country needed to be reunified.
The costly war had resulted in debt.
Southern farmland and infrastructure were devastated.
DONE

1,3,4,5

Explanation:

The future of more than four million formerly enslaved people was unknown.

the country needed to be reunified.

The costly war had resulted in debt.

Southern farmland and infrastructure were devastated.

explanation:

the muslim keep their culture pure by finding new value

porter is writing economic history because he is focusing on the cost of developing vaccines.