2 These data reflect three possible combinations of food and clothing that can be produced from a given set of resources. Food 4 3 2 Clothing 5 9 12 Refer to the above data (Note that the PPF has its normal bowed-out shape). The opportunity cost of the 9th unit of clothing will be: A) 1 units of food B) 4 units of food C) less that 1/4 units of food D) more than 1/4 units of food. E) 1/4 units of food