The primary purpose of a pharmacy sending email messages to its customers is to __________ customers.

When considering the primary purpose of a pharmacy sending email messages to its customers, the goal is to ensure that customers receive important information regarding their health and wellness. Pharmacies often send emails to inform customers about their prescriptions, medication refills, health tips, store promotions, and product availability. This demonstrates an effort to keep customers aware of pertinent information that can affect their health and the services provided by the pharmacy.

While the other options could be secondary purposes—such as promoting new products or reminding customers about upcoming appointments or refill dates—the core aspect of this communication is rooted in informing customers. Providing them with relevant and timely information is essential for maintaining a positive relationship and ensuring they have access to necessary health resources.