The formula

is used to calculate CDI.

Multiple Choice

$($Percent of the total U$.$S$.$ population in a market segment $$ Percent of a brand's total U$.$S$.$ sales in a market segment$)100$

$($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$)100$

$($Percent of a brand's total U$.$S$.$ sales in a market segment $$ Percent of the total U$.$S$.$ population in a market segment$)100$

$($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$)100$

of the ratio of sales revenue of the firm to the total sales revenue of all firms in the industry, including the firm itself