The answer preserves the different questions and makes the allocative criterion and broader scope visible.
Full modeled capacity use does not establish that the chosen output mix serves the relevant criterion or that omitted benefits and costs are favorable.
Allocative judgment needs an explicit criterion and may require prices, preferences, distribution, rights, and other consequences.
Answer: a
Choice a. State which efficiency question is being asked, the boundary and counterfactual, the allocative criterion, relevant consequences, and the scope of omitted parties and costs.