<span>B. an international association of nations </span>
Rebelling ethnic groups is 100% correct
About 500 B.C.E, the metal that made Moroe prosperous was A) Iron.
Thus, the pharaohs were known as the rulers of the Two Lands, and wore the pschent, a double crown, each half representing sovereignty of one of the kingdoms. Ancient Egyptian tradition credited Menes, now believed to be the same as Narmer, as the king who united Upper and Lower Egypt.
