Which Statement Best Describes the Cause of "Overrun and Over-Trampled

Multiple Choice

Which statement best describes the cause of "overrun and over-trampled" national parks

A) Park administrators do not use the best science available to manage park resources.
B) National parks are treated as free goods by their visitors.
C) National parks annually adjust park visitation fees to the rate of inflation.
D) The price of entrance to national parks has kept pace with other forms of recreation.