what's the answer ?

The Security Classification Guide (SCG) states: (C) Cpl Rice and Sgt Davis are attending the joint exercise. (U) The exercise begins 1 May. (C) The name of the exercise is Jagged Edge. (S) The name of the attendees and the name of the exercise. (U) Classification by compilation: The names of attendees combined with the name of the exercise, is classified Secret. The new document states: *(S) Cpl Rice and Sgt Davis will both be attending the Jagged Edge exercise. \"Note: The compilation of attendees and the name of the exercise within the same document is classified as SECRET per the SCG What concept is used to derivatively classify the statement in the new document? (Select the best answer) Contained in i 0 . Directed by Revealed by Classification by Compilation e105 170