What did salvation cults of the Hellenistic era promise believers which was NOT availiable through Greek philosophy or traditional religion?
a. An ethical system for living
b. The promise of a rewarding afterlife
c. A community of believers
d. An explanation of natural phenomena
It would be "b. The promise of a rewarding afterlife" that was not available through Greek philosophy or traditional religion, since this was not part of the preexisting religious doctrine.