If the U$.$S$.$ focuses only on making corn, it can make $200$ tons per day; if it focuses only on making coffee, it can make $40$ tons per day. If Brazil focuses only on making corn, it can make $20$ tons per day; if it focuses only on making coffee, it can also make $20$ tons per day. Assume all PPFs are straight lines.

Which country holds an absolute advantage in making corn?

Question $13$ options:

a$)$

U$.$S$.$

b$)$

Brazil