For Case II, in What Range Must the "International" Price

Multiple Choice

For case II, in what range must the "international" price of wheat fall? i.e. if North and South Dakota trade only with each other, what is the range of prices possible?

A) Between 1 bushel of wheat = 4/3 bottles of beer and 1 bushel of wheat = 2 bottles of beer
B) Between 1 bushel of wheat = 3/4 bottles of beer and 1 bushel of wheat = 2 bottles of beer
C) Between 1 bushel of wheat = 3/4 bottles of beer and 1 bushel of wheat = ½ bottles of beer
D) None of the above