Which statement is the best example of a supporting reason for this claim?
Claim: National parks belong to this country, and admission should therefore be free for all taxpaying Americans.
A. Many people forget that while they are parks, they still have dangerous animals.
B. Once you're inside a park, you still have to pay for lodging and food.
C. Only a small percentage of taxpayer money goes to national parks.
D. National parks are maintained by an army of volunteers and workers.