Answer:
A
The Production possibilities frontiers is a curve that shows the various combination of two goods a company can produce when all its resources are fully utilised. The PPF is bowed outward if increasing opportunity costs exist.
As more quantities of good X is produced, there would be fewer resources available to produce good Y. As a result, less of good Y would be produced. So, the opportunity cost of producing a good increase as more and more of that good is produced.