The United States experienced a rapid growth of its population of in the early 1900s. Which of the following factors did not contribute to this rapid population growth? (SC.912.L.17.5)
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1 point
A, Immigration was greater than emigration.
B. The birth rate was higher than the death rate.
C. More people moved from farms to large cities.
D. Advances in technology led to cleaner food and water supplies.