How were lower and upper egypt united?

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.

length of the cultivating season was not a problem of new england agriculture

answer; ///i do believe that the correct answer is (d); ///athens had a small population;