If the International Price of Beer Is One Keg of Beer

If the international price of beer is one keg of beer = 1 bottle of whiskey, how much whiskey will Northern Ireland consume? Each country completely specializes and 500 kegs of beer are traded for 500 bottles of whiskey.

A) 1,000 bottles
B) 1,200 bottles
C) 500 bottles
D) 600 bottles