10 The following table shows the production of wheat (bushels per hour) and cloth (yards per hour) for Country A and Country B. In order for both countries to gain from trade, one bushel of wheat must trade for_____.
(A) between 1/2 and 2 yards of cloth (B) between 6 and 18 yards of cloth (C) between 1/2 and 3 yards of cloth (D) between 1/3 and 3 yards of cloth