What Does the Term Minimum Efficient Scale Mean

Multiple Choice

What does the term minimum efficient scale mean?

A) The largest-size plant capable of achieving minimum long-run average cost.
B) The lowest average cost of production for a particular size of plant.
C) The smallest size of plant capable of producing a particular output.
D) The lowest level of efficiency which a firm is capable of producing.
E) The smallest-size plant capable of achieving minimum long-run average cost.