7. As a result of the many peasants lost their farms and had to move to cities looking for jobs.

1. Development of the colonial empire

2.Enclosure Movement

3.Enlightenment

4.Industrial Revolution

Ibelieve its c not quite sure.

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.