After Reading the Paragraph Below, Answer the Question(s) That Follow(s)

After reading the paragraph below, answer the question(s) that follow(s) .
You're a member of an influential African family that's been displaced from your home by civil war. You're trying to select a new country in which to settle to gain better economic opportunities. You know that Nigeria is a large country with rich natural resources and are considering it for your new home. You've learned some basic principles of population growth and did some research on the Internet. Among the data you found was the following diagram of the current age structure of the country.

-What key data would be important in allowing you to more confidently assess the future population of Nigeria?

A) mortality rate prior to reaching sexual maturity
B) relative birth rates of males versus females
C) incidence of disease
D) availability of resources