Fill in the blank: In email marketing campaigns, _____ are sent to gain new customers.1 pointacquisition emailsinvestment emailsattainment emailssurvey emails

In email marketing campaigns, acquisition emails are sent to gain new customers.

Acquisition emails are specifically designed to attract new subscribers and convert them into customers. These emails typically include special offers, introductory content, or compelling reasons for potential customers to engage with a brand. The main goal is to increase a company's customer base by encouraging recipients to take action, such as making a purchase or signing up for a service.

In contrast, investment emails usually focus on existing customers, survey emails solicit feedback, and attainment emails might refer more to achieving set goals rather than acquiring new customers. Therefore, out of the given options, acquisition emails clearly denote the primary intention of gaining new customers.