Which of the Following Is a Problem Associated with Judging

Which of the following is a problem associated with judging competitiveness by structure?

A) It requires that each action of a firm be analyzed on a case-by-case basis, which is very time- consuming and expensive.
B) Whether the actions of a firm can be considered appropriate competitive behavior depends on the circumstances.
C) Structure can be a predictor of future performance.
D) It is difficult to determine the relevant market and the relevant industry necessary to identify the structural competitiveness of any industry.