The formula ________ is used to calculate CDI. of the ratio of sales revenue of the firm to the total sales revenue of all firms in the industry, including the firm itself
a. (Percent of a brand's total U.S. sales in a market segment ÷ Percent of the total U.S. population in a market segment) × 100
b. (Percent of the total U.S. population in a market segment ÷ Percent of a brand's total U.S. sales in a market segment) × 100
c. (Percent of a product category's total U.S. sales in a market segment ÷ Percent of the total U.S. population in a market segment) × 100
d. (Percent of the total U.S. population in a market segment ÷ Percent of a product category's total U.S. sales in a market segment) × 100