Dumping is defined as selling a product in another country for less than production cost. Shrimp producers from Country F are selling shrimp in Country G below the cost of producing shrimp in Country G. So Country F' s producers are dumping shrimp.
In order to evaluate the argument above, it is necessary to determine whether shrimp producers from Country F are selling shrimp in Country G for considerably less than production cost or just slightly less.