Option B
The IO Economics perspective locates the source of competitive advantage for a firm at the Industry level
Industrial organization is a domain of economics apportioning with the important behavior of firms, administrative policy, antitrust behavior, and market contestant. The industrial organization employs the economic theory of value to industries. The theory designates the impact of competitive forces on the industry, as properly as, how the profitability is circumscribed by them.
Most utmost firms fighting in an industry or an industry section control comparable sets of strategically-relevant resources and thus attempt alike strategies. Recognize the strategy appropriate for the industry which returns the returns inquired.