Marketing Cloud Account Engagement sets cookies on visitors' browsers to track their activities. Cookies are small bits of text that a website leaves with the browser so the website can remember who the visitor is. Cookies are the most common method used to identify users online and provide a personalized browsing experience. Marketing Cloud Account Engagement uses cookies to track visitor behavior on the website, such as pages visited, forms submitted, or files downloaded. Marketing Cloud Account Engagement also uses cookies to associate visitors with prospects once they fill out a form or click on a tracked link in an email. Option A is not correct because UTM parameters are not set by Marketing Cloud Account Engagement, but by the marketer who creates the URL with query strings that indicate the source, medium, campaign, and other information of the traffic. Option B is not correct because tracking pixels are not set by Marketing Cloud Account Engagement, but by the email client that renders the email with a hidden image that sends a request to Marketing Cloud Account Engagement's server and records the open event. Option D is not correct because Google Analytics tracking code is not set by Marketing Cloud Account Engagement, but by the website owner who embeds the code on the website to collect and analyze web traffic data. Reference: The Ultimate Marketing Cloud Account Engagement Admin Guide to Web Tracking Cookies - The Spot, How to Run an A/B Test in Marketing Cloud Account Engagement: A Step by Step Guide (2022), The Basics of A/B Testing in Marketing Cloud Account Engagement - The Spot

The automation tool that would best achieve this is to create a page action set to tag prospects as having viewed it and add them to a list. A page action is a feature that allows you to track and act on the behavior of prospects who visit specific pages on your website, such as your pricing page, product page, or thank you page. You can use page actions to perform actions on the prospects who visit the page, such as adding them to a list, assigning them to a user, or changing their field values. You can also use page actions to customize the content or layout of the page based on the prospect's attributes or behaviors2. To create a page action, you need to specify the URL of the page that you want to track, and the actions that you want to execute when a prospect visits the page. For example, you can create a page action that matches the URL of your pricing page, and tags the prospect as having viewed it and adds them to a list of pricing page visitors.