When simple semiconductors was operating at the minimum efficient scale of 10,000-12,000 units per month, the firm's cost per unit was $45. however, when the output level was increased beyond 12,000 units, the cost per unit increased to $47. this increase was attributed to the wear-and-tear of the machinery, and complexities of managing and coordinating. what is this phenomenon known as? a) minimum efficient scaleb) diseconomies of scalec) experience curve effectd) learning-curve effect