Accurately Assessing the Competitiveness of a Company's Cost Structure and Value

Accurately assessing the competitiveness of a company's cost structure and value proposition requires

A) that managers understand an industry's entire value chain system.
B) that managers understand the detail of their own company's value chain.
C) that managers are involved in functional strategy development.
D) that managers understand the firm's profitability outlook.
E) All of these.