Which of These Generalizations About Current Urbanization Is Correct

Which of these generalizations about current urbanization is correct?

A) Highly industrialized countries have lower rates of urbanization than do less-developed countries.
B) Population growth in the next 30 years will continue to be greatest in the cities of more-developed countries.
C) Urban growth in less-developed countries is driven by rural-to-urban migration and higher-than-average fertility rates of recent migrants.
D) Urbanization around the world is driven by the growth of manufacturing in suburban areas.