How much did the world's population increase during the twentieth century?
A)Not at all-it stayed about the same.
B)It doubled.
C)It tripled.
D)It quadrupled.

Name: How much did the world's population increase during the twentieth century? A)Not at all-it stayed about the same. B)It doubled. C)It tripled. D)It quadrupled.
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The world's population quadrupled during the twentieth century, growing from about 1.6 billion in 1900 to over 6 billion by 2000.

How Much Did the World's Population Increase During the Twentieth