The River Rouge Plant Was Built by the Ford Motor

The River Rouge plant was built by the Ford Motor Company in the 1920s to produce the company's Model A car.Which of the following is evidence that the River Rouge plant suffered from diseconomies of scale?

A) Despite an expensive advertising campaign, the Model A did not earn the company a profit.
B) Model A cars made at the River Rouge plant failed to earn Ford a profit. Ford eventually constructed smaller plants to make the Model A at a lower average cost.
C) Model A cars made at the River Rouge plant failed to earn a profit. Ford reduced the average cost of the Model A by cutting its employees' wages.
D) Model A cars made at the River Rouge plant failed to earn a profit because the price of steel used to manufacture the Model A rose when workers in the steel industry went on strike.