Products such as bleaches, aspirin, unleaded regular gasoline, and some soaps are distinguished by differences such as brand names, packaging, color, smell, or "secret" additives. With these products, marketers attempt to convince customers that their product is significantly different from the others and should therefore be demanded over competing brands. These marketers are using:
a. cannibalization
b. perceptual mapping
c. psychographic targeting
d. integrated marketing
e. product differentiation
ANSWER: e