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Which common problem of U.S. cities is now a problem in United States national parks?

BJ

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6 years ago

Which common problem of U.S. cities is now a problem in United States national parks?

Which common problem of U.S. cities is now a problem in United States national parks?

a. homeless people
b. lack of funding for schools
c. air pollution
d. high crime rates
e. alcoholism

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Tanzious02

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