Which of the following was a problem with Greek democracy? A. Often, an assembly reversed important decisions after just a few weeks.
B. Powerful speakers sometimes persuaded ordinary citizens to vote unwisely.
C. All of the above.
D. None of the above.

The ceremonial column.

Basically create a schedule on what you need to study and stick with it

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.