Final answer:
Free Blacks in the South before the Civil War had the right to marry, but did not have the right to vote, testify in court, or carry a firearm. While they had the right to self-defense, striking a white person in self-defense would have had serious consequences. The correct answer is option a).
Step-by-step explanation:
Before the Civil War, free Blacks in the South had limited rights. They did not have the right to vote (e), testify in court (D), or carry a firearm (c) in most states. However, they typically had the right to marry (a) and had some protection for self-defense, although hitting a white person in self-defense (b) would likely have resulted in severe consequences due to racial tensions and lack of legal protection for free Blacks at the time.