The Table Below Shows Units of Wheat and Cloth Produced

The table below shows units of wheat and cloth produced by each worker per day in both the countries.Table 20.1

-According to Table 20.1, the opportunity cost of producing cloth in the U.S. equals:

A) 2 units of wheat.
B) half a unit of wheat.
C) 3 units of wheat.
D) one-third of a unit of wheat.
E) 6 units of wheat.