Answer is D.
There are many reasons for the rapid population growth rate in most developing countries is higher than in developed countries. Some of the major ones are: Women are least educated and they don't have easy access to birth control measures. Developing countries depend on agriculture and other farming activities. Children can be put to work at a young age to do these jobs. So, to improve economic condition of their families. Therefore, high fertility rate may not account to high population growth rate in most developing countries.
