I believe the answer would be C. (Along China's east coast due to the fertile soil found along the Yellow River and the Yangtzi River)
Answer: D. The Demographic transition
Explanation: Demographic transition explains the association between population growth and economic development. It explains the high infant mortality and high birth rate associated with non-industrial, low technology and many developing countries and the low infant mortality, low birth rate commonly found in industrial, high technology and high level of education found in developed countries.
It is an historical overview which shows high birth rate in low industrial and developing countries and low birth rate in industrial and developed countries.
They could physically hurt you for not cooperating
They were all in Mesopotamia
