Identify one way Zoroastrianism changed over time.

One way Zoroastrianism changed over time is when many scholars had disputed the historical forms of faith of Zoroastrianism because of its ancient faith at that time which is recorded in the history. These scholars also did not agree about the unknowns of this religion because one reason is that there is a big gap between Zarathustra, the prophet who founded Zoroastrianism, and the Magi, the adherent class of priests.