In paragraph 4, why does the author mention the cities of Hierakonpolis and Elkab? A. To give an indication of the level of prosperity that Memphis is thought to have enjoyed from its earliest days B. To compare the Memphis region to them in terms of their similar combinations of characteristics providing advantages for early settlement C. To identify the models that the founders of Memphis followed in laying out the national capital D. To suggest that the combination of desert pasturage and alluvial arable land in the same area was very common