In the United States,a Cup of Hot Chocolate Costs $5

In the United States,a cup of hot chocolate costs $5.In Australia,the same hot chocolate costs $6.5 Australian dollars.If the exchange rate is $1.3 Australian dollars per U.S.dollar,what is the real exchange rate?

A) 1/2 cup of Australian hot chocolate per cup of U.S.hot chocolate
B) 1 cup of Australian hot chocolate per cup of U.S.hot chocolate
C) 2 cups of Australian hot chocolate per cup of U.S.hot chocolate
D) None of the above is correct.