Answer:
ok there is the yemen civil war,syiran civil war ,iraqi insurgencys,kurdi insurgeny fight iran and many more. why should you be concerned? the u.s.a could get involved and casue more damage, also russia is supporting the syiran government if the us gets involved it could cause a bigger conflict hope this helps
Explanation:
the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).
