Multiple Choice

A firm needs to produce 100 metres of cloth and has five production methods available, each using a different combination of labor (workers) and energy (tonnes of coal). The input requirements for each method are shown in the table below.

MethodWorkersTonnes of Coal
A110
B25
C46
D53
E101

A production method is considered inefficient if another available method can produce the same output using less of at least one input without using more of the other. Based on this principle, which method is clearly inefficient?

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Updated 2025-09-19

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