Which of the following is not an argument against free trade?

A) Diversification and defense
B) Comparative advantage
C) Dumping by monopolistically inclined exporters
D) Infant industries

Comparative advantage is actually an argument in favor of free trade, as it suggests that countries should specialize in producing the goods they are most efficient at producing and trade for the goods they are less efficient at producing. A, C, and D are all arguments against free trade, with A referring to the importance of diversifying a country's economy and protecting it from external shocks, C referring to the unfair competition that can be posed by monopolistic exporters, and D referring to the need to protect new and emerging industries from established competitors.