What Was a Consequence of Dualism in Zoroastrian Beliefs

What was a consequence of dualism in Zoroastrian beliefs?

A) Many different gods fought with one another for human followers.
B) One god,Ahura Mazda,was worshipped by Persians; another,Ahriman,was worshipped by the conquered peoples.
C) Humans' choices between good and evil determined their reward or punishment in the afterlife.
D) Corpses had to be buried in bare earth so that they would decompose quickly and be reunited with the mother goddess,the consort of Ahura Mazda.