Answer:
a. Ed is allergic to his roommate's cat.
Explanation:
In the case of coase theorem the economic conditions in which there is a conflict of proerty rights and the parties that are involved could bargain or negotiate the terms so this will correctly to be shown the complete cost also the values related to the property rights at issue that could result in the effecient outcome or result
So as per the given situation, the option a is correct
