Which of the Following Statements About Fertility in Low-Income Countries

Which of the following statements about fertility in low-income countries is true?

A) Fertility decline has begun in virtually all low-income countries because fertility is low.
B) Although fertility remains high in many poor nations and regions of the world,fertility decline has yet to begin in any of these nations.
C) Although fertility is now low in many low-income countries,fertility decline is fluctuating in many of these nations.
D) Although fertility remains high in many poor nations and regions of the world,fertility decline has begun in virtually all of these nations.