A reservation process allows customers to reserve a flight, hotel room, and rental car as...

For a reservation process that includes various components like flights, hotel rooms, and rental cars, showing an option for travel insurance specifically when a flight is part of the itinerary necessitates dynamic UI adjustments based on the user's selections.

A. A visible when condition applied to the check box: This configuration directly supports the requirement by dynamically controlling the visibility of the travel insurance check box based on whether the itinerary includes a flight. A Visible When condition can evaluate the presence of a flight in the itinerary and accordingly display or hide the insurance option, providing a tailored user experience.

Action sets (B) typically define user interactions with UI elements but are not used for conditionally displaying those elements based on other case data. Declare expressions with forward chaining (C) are used for calculating values rather than controlling UI element visibility. Validate rules (D) ensure data integrity during submission and are not involved in UI visibility conditions.