[ 387 ] Geography and the World GED ® TEST SOCIAL STUDIES FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Which conclusion is best supported by the information presented in the chart? Earliest Civilizations Egypt Sumer India China Start Date 3000 B.C. 3200 B.C. 2500 B.C. 2100 B.C. Location Nile River valley Euphrates River valley (Iraq) Indus River valley Huang Ho River valley Main Sites Memphis, Thebes Ur, Eridu Harappa, Mohenjo-Daro Zhengzhou, Anyang Types of Writ- ing hieroglyphics cuneiform Indus writing Chinese char- acters Forms of Government monarchy monarchy unknown monarchy a. All early civilizations were monarchies. b. China is the oldest of the world’s civilizations. c. Many of the world’s earliest civilizations developed in river valleys. d. Civilization began in China and spread westward across Asia.