Answer:
DEMOGRAPHIC
Explanation:
According to the scenario, Mistine over the years is no more targeting just housewives but more groups such as teenagers and higher-income women.
This kind of market segmentation is demographic in nature
Demographic segmentation is a market segmentation that is done according to age, race, religion, gender, family size, ethnicity, income, and education.
Mistine's strategy is targeting people based on their age because the scenario states that 'teenagers' are a new target group. It also states that Mistine now targets 'higher-income' women which implies that those category of people have been targeted based on their income.