Use the Following to Answer Question(s): Production Possibilities Schedule for Two

Use the following to answer question(s) : Production Possibilities Schedule for Two Commodities

-(Exhibit: Production Possibilities Schedule for Two Commodities) Assuming constant costs in the neighborhood of their current levels of production, the exhibit shows the number of units of commodity X each country would have to forgo to produce the additional units of commodity Y indicated.Further assume that the only input is labor and that it remains fully employed.The cost to Canada of producing an additional unit of Y is _______ unit(s) of X.

A) 1
B) 2
C) 3
D) 4