The production possibilities frontier has a bowed-out shape because the quantity of guns the economy must give up in order to produce more butterthe more butter is produced. In other words, the opportunity cost of butterwith increased production. Imagine a society that produces military goods and consumer goods, which we'll call "guns" and "butter," respectively. Indicate which of the points are impossible for the economy to achieve and which are feasible but inefficient. Characteristic A B C D Impossible for the economy to achieve Feasible but inefficient