Answer:
D none of the above
Step-by-step explanation:
Answer would be Birth rate and Economic development, But was not on there. But here is more understanding of it .
The factors that cooperate for population growth are the high birth rate (number of births) alongside the decrease in infant mortality, economic development and the increase in life expectancy of the population.
Such an increase in life expectancy is the result of improvements in health systems, advances in medicine and basic sanitation and adequate hygiene for populations.