Answer :
Answer: (E) Culture
Explanation:
The culture is the term which is used to refers to the people and the group behavior, values, behavior, specific goals and also the attitude in the society.
According to the given question, the culture is one of the type of external influence that the Teresa is examining and it helps in analyzing the consumer's lifestyles and also the self concept.
This process is suitable for the Teresa so that she can easily understand the actual requirement and demand of the customers on the basis of their specific culture.
Therefore, Option (E) is correct answer.