The Production Possibilities for Country X Are Either 6000 Bushels

The production possibilities for Country X are either 6000 bushels of soybeans or 10,000 bushels of wheat. The production possibilities for Country Y are 2000 bushels of soybeans and 4000 bushels of wheat. Which of the following is true?

A) Country Y should specialize in the growing of soybeans according to the principle of comparative advantage.
B) Country X is the least-cost producer of wheat.
C) The domestic opportunity cost of wheat production is lower in Country Y.
D) The high cost producer of soybeans is Country X.