Question

Which sentence is correctly capitalized?

In the decades before the war, labor was provided by immigrants in the north and slaves in the south.
In the decades before the war, labor was provided by immigrants in the North and slaves in the south.
In the decades before the war, labor was provided by immigrants in the north and slaves in the South
In the decades before the war, labor was provided by immigrants in the North and slaves in the South

Answer 1

4 . Both North and South are capitalized in the last sentence .