【单选题】The Hong Kong dollar is pegged to the U.S. dollar at a rate of 7.8 Hong Kong dollars to 1 U.S. dollar. Suppose the central bank of Hong Kong changes the exchange value to 7.3 Hong Kong dollars to 1 U....
A.
The Hong Kong dollar has been revalued by 0.5 percent.
B.
The Hong Kong dollar has been devalued by 0.5 percent.
C.
The Hong Kong dollar has been revalued by 6.4 percent.
D.
The Hong Kong dollar has been devalued by 6.2 percent.