Final answer:
In an email strategy aimed at building brand loyalty with existing customers, making a purchase would not be a good call-to-action. Promoting related products, leaving a review, and sharing new content are all good call-to-action options.
Step-by-step explanation:
In an email strategy aimed at building brand loyalty with existing customers, the call-to-action should align with that objective. Therefore, making a purchase would not be a good call-to-action. While making a purchase is a desired outcome, it does not necessarily contribute directly to building brand loyalty unless it is coupled with additional incentives or rewards for the customer.
Promoting related products, leaving a review, and sharing new content to drive brand authority are all good call-to-action options. By promoting related products, customers are encouraged to explore more offerings from the brand, which can enhance their experience and loyalty. Leaving a review and sharing new content not only help build brand authority but also foster engagement and a sense of community among existing customers.