In the past decade, which of the following has NOT been a major cause of the increase in the world's population ?

In the past decade, which of the following has NOT been a major cause

1.	In the past decade, which of the following has NOT been a major cause of the increase in the world's population ?
A.	Longer life span
B.	Lower infant mortality
C.	Increase in birth rate
D.	Improved sanitation
Answer» D. Improved sanitation

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In the past decade, which of the following has NOT been a major cause of the increase in the world's population ?

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