E) social class 5) According to the 80/20 rule, which of the following is true? A) 80 percent of a product's marketing cost should be equal to 20 percent of the firm's total marketing budget B) 80 percent of a product's market should be consumers who are 20 or older. C) 80 percent of a product's customers account for 20 percent of the product's marketing expenditures D) 80 percent of a product's sales come from 20 percent of the product's purchasers. E) 20 percent of a product's customers account for 80 percent of the product's marketing expenditures TRUE FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 6) Age and gender are examples of demographic segmentation variables 7) The 20 percent of U.S. households that have the highest incomes have more discretionary spending 7) than other market segments