If One USDollar Could Be Exchanged for One Australian Dollar in 1970,and

Multiple Choice

If one U.S.dollar could be exchanged for one Australian dollar in 1970,and one U.S.dollar can now be exchanged for 0.98 Australian dollars,which of the following is true?

A) The U.S.dollar gained value against the Australian dollar.
B) The Australian dollar lost value against the U.S.dollar.
C) The Australian dollar gained value against the U.S.dollar.
D) Both A and C are true.