Letter D is correct! Increasing customer retention and reducing customer churn.
Relationship marketing is a set of actions that a company uses to strengthen its relationship with the customer, in order to retain and retain them. The addition of Burberry has increased its involvement in social media with the goal of staying closer to its customers and offering benefits such as collaboration with a famous actress. This strategy strengthens the customer-brand relationship by translating the brand's interest in meeting its customer's needs and wants and thus strengthening brand recognition in the marketplace.