In an Administrative Message, what should the Sending Agency field contain?

The correct choice for what the Sending Agency field should contain in an Administrative Message is the name of the sending agency. This is crucial because it provides clarity and identification of who is sending the message. Proper identification is essential in communication systems like IDACS to ensure the recipient can verify the source of the information. The name helps in tracking messages and establishing accountability, which is particularly important in a law enforcement or administrative context where clear communication can have significant impacts on operations and response.

In contrast, including the agency's phone number, address, or date does not serve the same identifying purpose as the agency name. While these elements may be relevant in other contexts, they don't directly facilitate the immediate recognition and accountability that the name of the agency does in this scenario.