Answer: a. reduction in export opportunities from Argentina to other countries.
Step-by-step explanation:
SilverFinn jewellery probably has intellectual property protection in other countries so when Argentinian producers make those counterfeits, they will be unable to sell it outside Argentina where it would not be allowed to be sold. This will reduce the export opportunities from Argentina to other countries.
It may also reduce the export opportunities of other goods from Argentina because other countries might be slow to trust that what Argentina is sending are indeed genuine goods because they have been known to counterfeit SilverFinn jewelry.