S1: Payment for imports and exports is made through a system called foreign exchange. P: The value of the money of one country in relation to the money of other countries is agreed upon. Q: These rates of exchange vary from time to time. R: For instance, an American dollar or a British pound sterling is worth certain amounts in the money of other countries. S: Sometimes a United States dollar is worth 12 pesos in Mexico. S6: Another time it may be worth eight pesos. The Proper sequence should be:

1. A Option A: PQRS
2. B Option B: QPRS
3. C Option C: PRQS
4. D Option D: RPQS

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