Egypt was primarily a polytheistic society; however, it became temporarily monotheistic under the reign of which leader

Pharaoh Akhenaten

Explanation:

The Egyptians experienced a brief period of monotheistic rule, as Akhenaten declared only worship to the sun god Aten. This departed from the millenary Egyptian predecessors, that ruled the Nile Valley, they worshipped a wide array of gods for the time before and after Akhenaten.

In many cultures that polytheism seems to be the rule, it has appeared to archeologists, and anthropologists, that sometimes a higher God or the father of all gods appears to be present. In this case, the sun god Aten would represent this source, or the origin, at the time Akhenaten ruled Egypt.

d) post-world war i