Poland Requires 4 Hours of Labor to Produce 1 Ton

Multiple Choice

Poland requires 4 hours of labor to produce 1 ton of coal and 1 hour of labor to produce a bushel of wheat. The Czech Republic requires 6 hours of labor to produce 1 ton of coal and 1 hour of labor to produce a bushel of wheat. What is the opportunity cost of coal in Poland?

A) 0.25 hours of labor per ton of coal
B) 0.25 bushels of wheat per ton of coal
C) 4 hours of labor per ton of coal
D) 4 bushels of wheat per ton of coal