The Productivity Frontier Represents A(n)

The productivity frontier represents a(n) :

A) convex structure (bulging inward) to capture the trade-off between value creation and production cost.
B) set of best-in-class strategic positions the firm can take relating to value creation and low cost at a given point in time.
C) output level a firm must operate at to achieve the break-even point.
D) combination of two commodities that can be purchased with a fixed amount of budget.