In June 2008, $1 Bought 104 Yen and in October

In June 2008, $1 bought 104 yen and in October, $1 bought 93 yen. This change means

A) there will be a movement down along the demand curve for dollars.
B) there was an increase in the value in the dollar, relative to the yen.
C) the dollar appreciated relative to the yen.
D) U.S. exports became more expensive for Japanese buyers.