Through Additional Page functionality, you may create an activity on two pages of the website for each experience. As an additional page, you may add the URL where you are willing to display the dynamic content. This dynamic content can be delivered through custom code or any other personalization you would like to do on the page.
Adding an additional page would ensure that if a user qualifies for Experience B, Target would deliver the respective experience on the Additional page when they navigate to it post the event. Hope that helps. Please refer to the help document above for more clarification of this option.