Evidence from Empirical Studies of Short-Run Cost-Output Relationships Lends Support

Evidence from empirical studies of short-run cost-output relationships lends support to the:

A) existence of a non-linear cubic total cost function
B) hypothesis that marginal costs first decrease, then gradually increase over the normal operating range of the firm
C) hypothesis that total costs increase quadratically over the ranges of output examined
D) hypothesis that total costs increase linearly over the range of output examined
E) none of the above