The statement that best assesses the gains and setbacks of Black Americans during Reconstruction is:
"While Black Americans were granted rights, states like Texas made it difficult for them to exercise those rights."
This reflects the complex reality of the Reconstruction era, where significant legal advancements for Black Americans occurred, such as the abolition of slavery and the granting of certain civil rights. However, many Southern states implemented laws and practices, like Jim Crow laws and other barriers, that effectively suppressed these rights and made it difficult for Black Americans to fully exercise them.