One of the reasons that the Greeks focused on philosophy was that they were beginning to question the role of their gods. Yet during the classical period, many temples and structures were dedicated to the gods. What BEST explains this contradiction?

A. The Greeks no longer believed in gods, but they liked the idea of temples to them.
B. Rulers tried to oppress philosophers by insisting that citizens participate in religion.
C. Some questioned religion, but it was still an essential part of Greek culture.
D. Greek philosophers ignored any system or religion or moral guidance.