Which of These Is Most Likely True

Which of these is most likely true?

A) The less developed countries will always have a high growth rate with no accompanying problems.
B) The growth rate will decline only when the less developed countries are industrialized as much as the more developed countries.
C) A good family planning program can help the growth rate decline even if the country is not yet industrialized.
D) The less developed countries already have a low growth rate.
E) The growth rate of more developed countries contributes more to world population growth.