Which one of the following is not a factor in determining a company's unit sales and market share of branded footwear in a particular geographic region?
a. The number of retailers stocking the company's footwear brand
b. The number of models/styles in the company's product line
c. Footwear features and footwear durability
d. S/Q ratings of the company's footwear
e. Expenditures for retailer support