Answer: the correct answer is C. Columbia consumes 4 tons of papayas and 4 tons of bananas.
Step-by-step explanation:
The consumption combination of 4 tons each for both papayas and bananas for Columbia can only be reached through trade, as it requires 3 units of labor to produce. But only 2 units are available. Columbia could reach this consumption combination/bundle by producing 8 tons of papayas and then trading 4 tons to Brazil for 4 tons of bananas. Note that all of the other consumption combinations provided/given can be produced without trade .