Question

What must happen to meet a steady population of 9 billion humans by 2050?
A.growth rates continue to decrease
B.replacement level fertility rate by 2050
C.both

Answer 1

Your question
What must happen to meet a steady population of 9 billion humans by 2050?
A.growth rates continue to decrease
B.replacement level fertility rate by 2050
C.both

Your answer
I think option C is correct answer.

I hope helps you

Answer 2

Answer:

c. both is the correct answer