After transmitting an IQ message, what will the requestor select from the response received?

The correct choice is to select a "Full query" after transmitting an IQ message. This option allows the requestor to receive all the detailed information available on the subject of their query. A full query captures comprehensive data, which is essential for proper decision-making and investigation purposes.

In the context of NCIC data systems, receiving a full query response is critical as it provides extensive details that could be necessary for law enforcement or other authorized personnel looking for in-depth information rather than just a summary or a brief overview. The specificity and depth offered by a full query ensure that the requester can access all pertinent details that may not be included in simpler reports, thus enhancing the quality of the information available for their needs.