The United Nations (UN) forecasts that the population in low-income countries will rise. What is likely to be one reason for this?
- AClimate change will lead to lower food output and starvation.
- BImproved education for girls will lead to a small decline in birth rates.
- CIncreasing numbers of people will migrate to higher income countries.
- DModern medicine and sanitation will lead to a rapid decline in death rates.