Which of the following statements best describes fertility rates in sub-saharan africa?
a.
fertility rates are among the lowest in the world, so populations are shrinking.
b.
fertility rates are among the highest in the world, so populations are growing quickly.
c.
fertility rates are at the world average, so populations are growing at an average rate.
d.
fertility rates are at the replacement rate, so populations are staying about the same.

It is B I used the other persons answer and got it correct

Explanation:

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

b is the answer i am assuming