What Does MES Refer To

Multiple Choice

What does MES refer to?

A) The marginal efficient size of a firm
B) The biggest-size plant that is capable of achieving economies of scale.
C) The biggest-size plant that is capable of achieving diseconomies of scale
D) The smallest-size plant that is capable of achieving diseconomies of scale
E) The smallest-size plant capable of achieving the lowest long-run average cost of production.