The amount of resources (in man-hour) required to produce 1 unit of good X or 1 unit of good Y in country A and B are:

Country: X : 1 hr , Y : 4 hr

Country : X : 6 hr , Y : 12 hr

Which of the following can be a mutually beneficial terms of trade, i.e. both countries have strictly positive gains from trade?

A. 1X = 2Y

B. 1X = 1Y

C. 1X = 0.25Y

D. 1X = 0.5Y

E. 1X = 0.35Y