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

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. Of course, 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 not a pure public good because

A) when trash cans overflow, a negative externality becomes a positive externality
B) it is not fenced to control access
C) weather is nice only in the summer, limiting optimal use
D) if too many people use it, one person's use can prevent others from using it as well
E) you have to drive to get there and the automobile is a private good