The answer is (D) positive association.
Regional cuisine refers to food that is characteristic of a particular geographic area. While popcorn is popular in many regions, Susan's choice is not specifically tied to a regional cuisine, making this option less likely.
Values refer to the principles or standards of behavior that are important to an individual. While values can influence food choices, the context of enjoying popcorn at a movie theater suggests a different motivation.
Emotional comfort involves choosing foods that provide a sense of well-being or comfort. While this could be a factor, the context of eating popcorn specifically at the theater suggests a more specific reason related to the environment.
Positive association refers to the connection between a particular experience and a positive feeling. Eating popcorn at the theater is a common tradition and is often associated with the enjoyable experience of watching a movie, making this the most likely reason for Susan's choice.
Functional value refers to the practical benefits of a product, such as nutrition or convenience. While popcorn is convenient, the context of the theater experience suggests that the choice is more about enjoyment than practicality.