An agreement is void if it is opposed to public policy. Which of the following is not covered by heads of public policy?

Agreements opposed to public policy are void. The heads of public policy include: trading with enemies (undermines national security), trafficking in public offices (corruption of public administration), and marriage brokerage contracts (interference with domestic relations). Contracts to do impossible acts are void for a different reason - impossibility of performance makes the agreement incapable of being performed, not because it violates public policy. This is a distinct legal doctrine.