Final answer:
The Operations Possibility Frontier (PPF) can be pushed outward by advancements in technology, improvements in skills and the utilization of new inputs, and enhanced management techniques. Collectively, these improvements in a country's productive capabilities enable the production of more and potentially higher quality goods and services.
Step-by-step explanation:
The Production Possibility Frontier (PPF) represents the maximum quantity of different combinations of goods and services that a society can produce given the resources and technology available. An outward shift in the PPF indicates that a country has increased its capacity to produce goods and services. The factors that can push the PPF outward include:
Therefore, the correct answer to what factors push the Operations Possibility Frontier outward is D. All of the above.