What Effect Is the Chinese Migration from Rural to Urban

What effect is the Chinese migration from rural to urban areas having on the population?

A) Urban families tend to be larger than rural families.
B) Urban families tend to be smaller than rural families.
C) Cities are better able to handle the burgeoning populations than the countryside is.
D) There are fewer opportunities for education and health care in the cities.
E) More Chinese are deciding to immigrate to other countries.