Efficiency and Equity Refer To, Respectively

Efficiency and equity refer to, respectively:

A) producing at the lowest possible cost, and producing the largest attainable output.
B) producing the largest possible output from a given set of resources, and fairness in the distribution of goods and services.
C) paying people based on what they need, and paying them based on what they contribute to output.
D) the main goal of economies that do not face a scarcity problem, and those that do face a scarcity problem.