Hi Victoria,
This is a built in feature of Forms 2.0! Instructions on how to set this up can be found here: https://community.marketo.com/MarketoArticle?id=kA050000000LHXcCAO#dynamic-thank-you-pages
As Josh said, there are some limitations on dynamic follow-up pages. This option will work if your leads can only choose one option. However, it will not work if you want to show your leads a different page when the check two boxes. The "Choice" functionality is limited to a single field.
Will