Since 1989 the importation of ivory from African elephants into the United States and Canada has been illegal, but the importation of ivory from the excavated tusks of ancient mammoths remains legal in both countries. Following the ban, there was a sharp increase in the importation of ivory that importers identified as presented for importation into the U.S. and Canada that was identified by importers as mammoth ivory.
What this question is testing
Your task
Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.
Common trap
Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.
Winning move
Predict what a right answer must do, then test each choice against the conclusion-evidence gap.
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