All of the questions you provided can be used to determine a media source's general intent, as they each focus on different aspects of what the source might be aiming to achieve. However, if you are looking for one example to represent the type of question that addresses general intent, the following would be suitable:
"Is the purpose of the source to inform me about a topic?"
This question directly asks about the intent to inform, which is a fundamental aspect of media evaluation. The other questions are more specific in their focus on persuasion or promotion.