Why Would an Analysis of the Way Juno Uses Editing

Why would an analysis of the way Juno uses editing techniques similar to those among other contemporary movies be considered a valid one?

A) because it automatically implies that Juno is a derivative work of art
B) because it approaches the movie in strictly formal terms
C) because it combines formal and comparative analyses
D) because it separates the film's editing from all other aspects of its aesthetic
E) because it divorces the film from its cultural context