ABC Company uses a Customer Relationship Management (CRM) system to track customer information. The customer table contains details such as customer names, email addresses, and subscription status. The company wants to automatically send an email whenever a customer's subscription status is set to "Active." They plan to achieve this by creating a trigger. Question: ABC Company wants to create a trigger on the customer table to automatically send an email when a customer's subscription status is set to "Active." How should the trigger be created, and what operations should it include?