Answer:
tax
Step-by-step explanation:
Tax is really the strongest alternative for achieving maximum social efficiency. That is because it is defined previously itself that even if the company opted for a contract, this has high operating costs and this transaction cost can be treated as a dead weight loss of that contract.
The loss of dead weight is a social loss and prevents the social system from achieving socially optimal results.Another factor that should be noticed about the contract process is, there might be certain compliance problems with private parties to execute such a deal.