Answer:
Abolition of Slavery
Explanation:
Hi there,
Before the Reconstruction period, slavery was commonplace in the southern regions of the US. After the Civil War, slavery was outlawed and allowed former slaves an opportunity to run for public office. They were finally considered people rather than a possession. Had slavery not been abolished, it would have been impossible for African Americans to run for political offices.
*While the abolition of slavery was one of the causes, there were several other factors that helped increase the number of African Americans in public office. This is not the only correct answer.
Hope this answers your question. Cheers.