Answer:
C. it promoted a belief in monotheism.
Explanation:
One unique feature of Judaism in ancient times was that it promoted a belief in monotheism. Unlike many other ancient religions, which often had pantheons of gods and goddesses, Judaism emphasized the worship of a single, all-powerful God. This belief in monotheism was central to Jewish identity and practice, distinguishing Judaism from other religions of the time. So, the correct option is C. it promoted a belief in monotheism.