Answer:
Buddhism
Explanation:
he Gupta Empire was an India empire that existed between the 3rd century CE to 590 CE. Hinduism spread widely during the Gupta empire in India and they had built several temples but governors didn't force Hinduism to their population which enabled the spread of other religions, especially the Buddhist religion.
Greek colonies in Asia Minor that had now become part of the Persian Empire.
Not to much if you take into account the factors of underdeveloped economy at the time, trade was a means of living, and the classes standings played a role in where you stood in a economy