Which of the following statements is true of product assortment?
a. The service levels that retailers provide can also be categorized by the width and depth of their product lines.
b. Product assortment allows traditional department stores and specialty stores to use low prices and discounts to lure shoppers.
c. Retailers are categorized according to the relationship between their products and their customers' needs.
d. Stores often modify their product assortments in order to accommodate factors in the external environment.
Answer: d. Stores often modify their product assortments in order to accommodate factors in the external environment.