Answer:
Sandy's buying behavior best illustrate the social variable known as Reference Groups
Explanation:
In business and marketing, a reference group comprises individuals who influence other peoples behaviors, opinions, beliefs and attitudes. In fact, they can influence how an individual makes a decision about what good and services to purchase as well as where to purchase it from.
In this case, Sandy's mother has in the course of her growing up years, become like one of those individuals in reference groups because she has influenced and made Sandy believe that buying from a discount store is the best bet. This explains why Sandy still shops at discount stores even though she is an adult and not being in the company of her mother.
