The civilizations of the Huang River valley and the Nile River valley were similar as both were ruled by dynasties. Option D is correct.
A dynasty is understood as a sequence of rulers from the same family, usually in the context of a feudal or monarchical system, but sometimes also appearing in elective republics. The longest-surviving dynasty in the world is the Imperial House of Japan, otherwise known as the Yamato dynasty, whose reign is traditionally dated to 660 BC.
As city populations increased in the early 1900s, cities grew up and out.
Mount Rushmore is located in South Dakota.
2/3 <span>of the members in each house</span>
