Question: What is the required setting for the 'cctype' (Content Type) of the 'Actions.xml' file in a 3GPP UICC application's Contact Manager, to ensure compatibility with User Actions configuration?
Option 1: application/octet-stream
Option 2: image/jpeg
Option 3: text/xml
Option 4: audio/mpeg
Explanation: The correct setting for the 'cctype' of the 'Actions.xml' file is `text/xml`, as this ensures the file, containing configurations in XML format, is properly identified and handled by the Contact Manager, facilitating the presentation of supported actions to the user when a contact is selected. Setting the content type to `text/xml` is crucial for the correct interpretation and execution of the defined actions.