How does a company do list-based remarketing?1 pointPost content specific to their brand on multiple platformsCreate a list of competitor’s ads to block on their platformUpload their list of email contacts to the platform of their choicePlace cookies on every platform a customer visits

List-based remarketing is a strategy used by companies to re-engage with their existing customers or users. Here's how a company can do list-based remarketing:

1. Identify the Audience: The first step is to identify the audience that the company wants to target. This could be existing customers, website visitors, or people who have interacted with the company's content in some way.

2. Create a List: Once the audience is identified, the company creates a list. This list can be made up of email addresses, phone numbers, user IDs, or any other identifiable information. This list is usually created from the company's own database of customers or users.

3. Upload the List: The next step is to upload this list to the platform of their choice. This could be a social media platform like Facebook or a search engine like Google. These platforms have specific tools for uploading customer lists.

4. Create and Launch Campaign: Once the list is uploaded, the company can create a remarketing campaign targeted at the people on the list. This campaign can include ads, emails, or other types of content designed to re-engage the audience.

5. Monitor and Adjust: After the campaign is launched, the company needs to monitor its performance and make any necessary adjustments. This could involve changing the content, targeting different segments of the list, or adjusting the budget.

So, the correct answer to your question is "Upload their list of email contacts to the platform of their choice".