Answer:
The correct answer is number "3": maximize the joint welfare, irrespective of the right of ownership.
Explanation:
Externalities are the side effects of the economy: pollution, noise, unequal distribution, immigration, and resource exploitation are a few examples. the Coase Theorem is a legal and economic theory that looks for economic efficiency in front of externalities like the one described above. In pursuing a Coase solution for externalities that could lead to a socially efficient outcome, increasing the numbers of welfare so enough less favored people and immigrants can have a roof to sleep under might be a good option.