A. stayed the same around 1.5 billion people
B. rose from 1.5 billion people to 3 billion
C. fell form 1.5 billion people to 1 billion
D. rose from 1.5 billion people to 2.5 billion
Correct Answer: fell form 1.5 billion people to 1 billion ✔
Last Updated: September 23, 2019