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

Question

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The Answer of 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

Which Common Problem of U