The Existence of Marginal Social Benefits Which Are NOT Marginal

The existence of marginal social benefits which are NOT marginal benefits for the industry producing the import substitutes

A) is an argument supporting free trade and non-governmental involvement.
B) is an argument supporting the use of an optimum tariff.
C) is an argument supporting the use of market failures as a trade-policy strategy.
D) is an argument rejecting free trade and supporting governmental involvement.
E) is an argument rejecting the domestic market failure concept.