Final answer:
An email auto-response is a trigger campaign email sent in response to a specific action, such as signing up for a service or making a purchase. It's an automated way to inform customers that their message has been received and will be dealt with accordingly.
Step-by-step explanation:
An email auto-response is an automated message that is sent in reply to incoming emails. The correct answer is B: A trigger campaign email sent in response to a specific action. Auto-responses are triggered by certain actions such as signing up for a newsletter, making a purchase, or sending an inquiry. This function is critical in managing customer expectations by informing them that their message has been received and will be attended to. Effective email auto-response campaigns are tailored to address the specific action taken by the user. Instead of sending a generic message to the entire staff list, it's more efficient and relevant to direct the message only to those who are equipped to handle the inquiry or action. This targeted response ensures that the recipient gets the most pertinent information, reducing the need for follow-up emails and enhancing customer satisfaction.