What are diseconomies of scale?

Select one:

A.The situation where a firm is able to obtain lower prices for the inputs it buys because of bulk buying.

B.Bureaucratic inefficiencies in management that result in decreasing returns to scale.

C.The smallest level of output at which a firm is able to minimize long-run average cost.

D.The situation where a firm's output decreases in proportion to the decrease in its inputs.