The correct answer is A, B, C, E, and F. Completion actions are tasks that are performed after a prospect successfully completes a marketing element, such as a form, landing page, or custom redirect. You can use completion actions to perform various actions on prospects, such as sending emails, adjusting scores, changing campaigns, or adding tags. Completion actions are available for the following activities: custom redirects, emails, forms, files, and page actions. You cannot use completion actions for automation rules, as they are a different type of criteria-based action that is triggered when a prospect matches the rule.
Answer D is incorrect because completion actions are not available for automation rules, as explained above. Reference: Completion Actions, [Automation Rules]