The constitutional amendments passed during Reconstruction were viewed as failures for many reasons.
were designed to protect the rights of African Americans.
showed that Jim Crow laws would never be tolerated.
provided economic opportunity for most African Americans.

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.