What is the concept involved in the transformation from "Attendance at the meeting is limited to squadron commanders" to "Squadron commanders will attend the meeting"?

The transformation from "Attendance at the meeting is limited to squadron commanders" to "Squadron commanders will attend the meeting" demonstrates the concept of deriving information. In this context, the first statement indicates who is allowed to attend the meeting while the second statement indicates that the squadron commanders are the attendees. The implications of the first statement lead to a derived conclusion about the presence of squadron commanders at the meeting.

In derivative classification, the concept of "derived by" is used when information is extrapolated or inferred from classified sources to create new documents or statements that are based on the original information. This is why the correct answer reflects this process; it illustrates how one piece of information can encapsulate or reveal further assertions based on classified data.