The major demographic change in China between 500 and 1000 C.E. was the
(A) decline of cities as populations moved to the countryside.
(B) widespread migration of Chinese to foreign lands.
(C) population decrease in the north due to frequent nomadic raids.
(D) large population increase in the south around the Yangtze.
(E) internal migration of the populace from rural to urban areas.
Answer: D