Suppose That Citibank Buys a Large Amount of Japanese Yen

Suppose that Citibank buys a large amount of Japanese yen from Toyota and Citibank does not want to continue holding too much yen.How should Citibank adjust its buy rate and sell rate of the yen yen per dollar to "square off"?

A) Citibank has to raise both buy and sell rates.
B) Citibank has to raise the buy rate, but lower the sell rate.
C) Citibank has to lower the buy rate, but raise the sell rate.
D) Citibank has to lower both buy and sell rates.