Approximately black soldiers were part of the union army. 75,000 200,000 500,000 1million

The best answer would be 200,000.

Explanation:

The real number is about 179,000, so if there was another answer like that, it would be correct. Anyways, the black soldiers made up about 10% of the army as 179,000.

c. women being denied the type of education men received

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.