This is crucial for evaluating the argument. If “production cost” doesn't refer to the country where the product is sold, and only to the country where the product originates, then the author’s argument falls apart. We wouldn't know if the shrimp scenario is a case of dumping, since we don't know what the cost of production is in country F, where the shrimp are produced.

Irrelevant. The argument is about whether a particular example qualifies as dumping, not about the negative effects of dumping.

What a producer charges within the country of production is irrelevant to the definition of dumping. What we want to know about is what they are charging in another country, and whether that is less than the \"production cost\" mentioned in the definition.

The effects of what country F's producers are doing are irrelevant. We just want to know if their actions qualify as dumping.

It doesn’t matter how big the difference is: the definition just says \"less than production cost\". We already know that the producers from country F are selling shrimp for less in country G than production cost in country G. We need to know if that is the production cost referred to, or if the definition actually means the production cost in country F.