This question actually is missing a little information. The question, written exactly like this, actually refers to South Carolina when it was a colony. At that time, there were NOT a lot of free African people in South Carolina.
The answer is D. The enslaved population in time outnumbered the free population.
BTW... Don't always trust the answers... Especially if there's only 1. Look at multiple sites and try actually reading your text book... Which is where I found this CORRECT answer.
The service of African-Americans in the military had dramatic implications for African-Americans. Black soldiers faced systemic racial discrimination in the army and endured virulent hostility upon returning to their homes at the end of the war.
