Production efficiency exists as a condition in which the economy stands to obtain all that it can from its resources and cannot have better of one good or benefit without having less of something else.
Productive efficiency exists concerned with yielding goods and services with the optimal mixture of inputs to yield maximum results for the lowest cost. To be constructively efficient indicates the economy must be producing on its exhibition possibility boundary.
Production efficiency exists as a condition in which the economy stands to obtain all that it can from its resources and cannot have better of one good or benefit without having less of something else.
Therefore, the correct answer is option D. cannot; less.
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