Imagine a 2,000-Acre Park with Picnic Benches,trees,and a Pond

Multiple Choice

Imagine a 2,000-acre park with picnic benches,trees,and a pond.Suppose it is publicly owned,and people are invited to enjoy its beauty.When the weather is nice,it is difficult to find parking,and the trash cans overflow with food wrappers on summer afternoons.Otherwise,it is a great place.The park is a common resource because

A) trash cans produce a negative externality, while good weather produces a positive externality.
B) access is limited due to driving distances.
C) if too many people use it, one person's use can prevent others from using it.
D) it is easy to fence in the park to control access.