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In carrying out a 5-force competitive analysis on vehicle fuel retailing in New Zealand, which of the following would be a sensible statement? O a. Competition amongst existing firms is exacerbated by industry decline, high exit costs, and emotional attachment to the industry. O b. Bargaining power of buyers is high as impoverished buyers have high propensity to use various discount coupons. O c. Margins can be expected to be low, as the competitive forces are mostly weak. O d. Bargaining power of suppliers is low, since each of the retail companies purchases large volumes. O e. The power of electric vehicle charging as a substitute is reduced by the cost of customers switching from existing fuel-burning vehicles