Demographers estimate the human population in 2050 to be between 7.8 and 10.8 billion-a range of three billion. Why is the estimated range so wide?
A. More-developed countries routinely inflate their estimates.
B. Projections are made by a variety of organizations.
C. Fertility rates are calculated with a standard formula by country.
D. Ranges include maximum and minimum estimated casualties of war.
E. Statistics regarding drought and famine are constantly shifting.
Answer: B
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