While taking an american history exam, marie was surprised and frustrated by her momentary inability to remember the name of the first president of the united states. her difficulty most clearly illustrates failure.

B. it promoted the powers of the executive branch

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.