【单选题】In the sentence "What if the buyer’s buyer is unable to pay before the buyer must pay the seller" , the word " buyer" appears three times. So, the identity of the third "buyer" is ( ).
A.
the exporter who produces the goods by himself
B.
the importer who buys the goods to use by himself
C.
the broker who buys goods from someone with a price and then sell it to others with a much higher price