If an Industry Is a Constant-Cost Industry,_____

If an industry is a constant-cost industry,_____

A) the prices of its inputs increase even when output remains constant.
B) it uses the same amount of inputs even at higher levels of output.
C) the prices of its inputs rise at a constant rate as it uses more inputs.
D) the prices of its inputs remain the same as the number of firms increases.
E) firms in the industry experience economies of scale throughout their scales of operation.