Answer: d. Can negotiate to correct a negative externality if there are no barriers to negotiation.
Step-by-step explanation:
The Coase Theorem posits that if there are no barriers to a transaction the conditions of an Efficient, Competitive Market must be observed, chief amongst them, NO transaction costs, then parties can be able to negotiate to correct Negative Externalities.
This means that given the right conditions, Parties can find an amicable way to use scarce resources in an optimal way.
Note: No Transaction costs in this scenario can also refer to No Barriers to Negotiation.