A leading sports equipment company is looking to drive more *new customer* membership sign ups with a marketing message aimed to health and wellness enthusiasts. Which of the following targeting approaches would you recommend?

The correct approach is to target the "Healthy Living" interest group and exclude a list of emails from existing memberships. This ensures the campaign reaches new potential customers who are interested in health and wellness, while preventing ad spend on individuals who are already members. Using a custom audience list of emails to target existing members would be suitable for retention or upsell campaigns, not for acquiring new customers. Targeting the "Healthy Living" interest group and existing member email addresses would include current members, which goes against the goal of driving new customer sign-ups. Simply using interest targeting without exclusion would likely include existing members, making the targeting less efficient for new customer acquisition.