posted by tabby .
The condition of non-exclusiveness means that: It is difficult to keep someone from benefiting from a public good.; There are negative externalities associated with a public good.; The public good is not very fancy.; or There are positive externalities associated with a public good.
I think it is There are negative externailities associated with a public good.
I disagree with your answer.
Non-exclusiveness means that everyone can be part of the program.