How Did the Classical Civilizations? View of Social Organization Differ

How did the classical civilizations? view of social organization differ from that of modern Western civilization?

A) Classical civilizations had poorly defined social groupings.
B) Classical civilizations felt that social mobility was critical to the well-being of society.
C) Modern societies are predicated on social mobility based on talent and the work ethic.
D) Modern societies lack any kind of social groupings designed to imply status.