If an American Tourist in Tokyo Pays More in Dollars

If an American tourist in Tokyo pays more in dollars for the same amount of yen that she bought last week, then:

A) a Japanese tourist in San Francisco pays more in yen for the same amount of dollars that she bought the week before.
B) the dollar has depreciated relative to the yen.
C) the yen has depreciated relative to the dollar.
D) the dollar has appreciated relative to the yen.
E) the dollar and yen both remained same in value.