Which of the following give the bowed-outward shape to the PPF? Choose one or more: O A. the law of decreasing opportunity cost O B. the law of increasing specialization O C. the concept of ceteris paribus O D. the law of increasing opportunity cost Unattainable level of production B) Efficient use of inputs in production Quantity of pizzas produced Attainable but inefficient use of inputs in production PPF Quantity of wings produced C