Structuralists take the position that multiple choice the rule of reason is appropriate and desirable in interpreting the sherman act. only unreasonable anticompetitive acts should be regarded as violations of the antitrust laws. industries should be judged on the basis of their technological progress and their price-output behavior. an industry that is highly concentrated will behave monopolistically.
for the answer to the question above, I think the answer is "an industry that is highly concentrated will behave monopolistically." A good example of this is Wireless Telecommunications Carriers I hope my answer helped you. Have a nice day!