Answer: d. the no-deadweight-loss argument.
Step-by-step explanation:
Dead weight loss occurs in an Economy with no equilibrium. This means that Demand and Supply are not meeting at a point where they should be due to some Government policies that were supposed to be good for the welfare of people but are negative from an economic standpoint and are now causing resources to be allocated inefficiently.
When Tariffs are introduced for example, they lead to dead weight loss because the general price of a good goes up and not enough of the good is being supplied due to the trade restriction.
Should a person be arguing for No-Deadweight loss, they would be against trade restrictions and not for trade restrictions. Option D is therefore correct.