I think the answer is A. But don’t quote me
In my view, correct answer is: This 1863 poster is recruiting African Americans to help <span>(2)assist in the efforts of the Underground Railroad.</span>
Explanation:
The First Battle of Bull Run, also known as the Battle of Manassas, marked the first major land battle of the American Civil War.
B - Slave revolts.
The revolt of Spartacus, which was also the most famous slave uprising in the history of the Roman Empire, lead to questions about the usefulness and effectiveness of the current governmental system in Rome. This, along with other factors, made them plunge into a crisis which ended through the transition to an empire.
It looks as if he is replying back to them about a situation that got him confined during "constructive": work as he talk about himself and his work while asking or waiting for an answer back .