According to the Textbook, What Is the Relationship Between a Country's

According to the textbook, what is the relationship between a country's income level and its population growth?

A) High-income countries tend to have higher fertility rates than low-income countries.
B) Low-income countries have higher fertility rates than high-income countries.
C) Low-income countries tend to have the lowest fertility rates due to fears of infectious diseases.
D) Middle-income countries have the lowest fertility rates because of their investment in birth control options, including condoms.