Based on Information in This Figure on Birth Rates and Wealth

Based on information in this figure on birth rates and wealth, what can be inferred about a population's birth rate as it relates to the Gross Domestic Product in the country?

A) Birth rates are higher in countries with lower wealth because the women are older when they give birth.
B) Wealthier countries have higher birth rates.
C) Wealthier countries have higher birth rates because people can afford more children.
D) Poorer countries have lower birth rates.
E) Birth rates are higher in countries with lower wealth because the women are younger when they give birth.