Final answer:
To target a list of email addresses, the correct option for an advertiser would be enabling email targeting in DV360. This option involves using email addresses directly for targeting within the platform's interface and is aligned with the ability to upload customer email lists for ad-targeting purposes.
Step-by-step explanation:
An advertiser looking to target a list of email addresses can utilize several methods. However, focusing on the options provided, we can determine which would be the most appropriate. Utilizing first-party data integrations, such as those you might find in a Customer Relationship Management (CRM) tool or digital advertising platform, allows advertisers to leverage data they have collected directly from their customers, including email addresses. By doing so, ads can be more effectively targeted to those users across various channels.
Using audience pixel tracking is a method to track users' actions on a website to create a targetable audience based on behavior, but it is not centered around email addresses as the starting point. Enabling email targeting within a platform like DV360 (Display & Video 360) refers to the ability to target users based on their email addresses directly within that platform's user interface, often through ad technology like Customer Match, which allows advertisers to upload their customer email lists.
The option of importing a CSV file through Campaign Manager is one of the ways an advertiser can target a list of email addresses by uploading a file containing the collected emails to the ad platform, which then uses the data to match to users across its networks for targeting.
Each method has its utility, but to choose any one option that specifically allows targeting a list of email addresses, the correct option in this case would be c) Enabling email targeting in DV360. This option directly indicates a feature used for targeting users based on their email information.