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C is corrent. The requirement is to determine which hedge is best to hedge the payment of British pounds in the future. Answer A is correct because a call option allows the importer to lock in the price of British pounds at the current exchange rate.
A is incorrect because selling British pound call options allows the purchaser to purchase British pounds at a fixed price in the future.
B is incorrect because selling British pound put options allows the purchaser to sell British pounds at a fixed price in the future.
D is incorrect because buying British pound put options allows the importer to sell British pounds at a fixed price in the future.