The Figure Given Below Illustrates the Market for British Pounds

The figure given below illustrates the market for British pounds. D_£ and S_£ are the demand and supply curves of the British pounds respectively. At an exchange rate of $2.50 per pound, there is an:

A) excess demand for 1 million pounds.
B) excess supply of 1 million pounds.
C) excess demand for 0.5 million pounds.
D) excess supply of 0.5 million pounds.