When evaluating whether an industry's environment presents a company with an above$-$average profitability and an attractive business opportunity, it primarily involves

a$)$ determining the industry's outlook for future profitability.

b$)$ determining the overall strength of the five competitive forces.

c$)$ determining which firms in the industry have a competitive advantage and how they got their advantage.

d$)$ constructing a strategic group map and assessing the attractiveness of the competitive position of each strategic group to determine the overall attractiveness of all the strategic groups.

e$)$ using value chain analysis to determine the relative cost positions of rival firms and to learn who the industry's low$-$cost producer is$.$