Answer:
The correct answer is option A, option B, option D.
Explanation:
A public good can be defined as the good that a consumer can consume without reducing its availability to others. This non-rivalrous nature of public goods makes it difficult to exclude those who do not pay from consuming it.
This makes public goods non-excludable in nature. The consumers can not be exempted even if they don't pay, so people have an incentive to consume without paying.