Final answer:
A U.S. company is competitively advantaged when the Brazilian real declines in value against the euro.
Step-by-step explanation:
A U.S. company that makes all of its goods at a plant in Brazil and then exports the Brazilian-made goods to European markets where the currency is euros will be competitively advantaged when the Brazilian real declines in value against the euro (option C). When the Brazilian real declines in value against the euro, it means that the U.S. company can sell its exported goods at a lower price in euro-based European markets, making it more competitive.