Final answer:
The most widespread Near Eastern mystery cult was called Mithras, named after a hero-god associated with light and good. This cult originated in ancient Persia and was popular among Roman soldiers.
Step-by-step explanation:
The most widespread of the Near Eastern mystery cults was called Mithras after the hero-god associated with the forces of light and good. Mystery cults were religious groups that featured secret rituals and became popular in Hellenistic cities. The cult devoted to the god Mithras originated in ancient Persia and found its way to Rome by the second century CE. It was especially popular among Roman soldiers.