In the 1950s, Kellyn Derma, a skin care company, produced only one type of lotion targeting the entire skin care market. Today, it produces different types of creams and lotions to suit different age groups and different skin types. In this scenario, Kellyn Derma is using the strategy of _____.
a. market segmentation
b. market cannibalization
c. cause-related marketing
d. green marketing
Answer: a. market segmentation