Final answer:
The final stage in the hierarchy of effects is loyalty, which refers to the repeat purchase behavior and long-term relationship a customer develops with a brand or product. Therefore, the correct option is E.
Step-by-step explanation:
The final stage in the hierarchy of effects is loyalty. This stage refers to the repeat purchase behavior and long-term relationship that a customer develops with a brand or product. It indicates that the customer is satisfied with the product and is likely to continue purchasing it in the future.