Which of These Is the Best Film Analogy of an Epigenetic

Multiple Choice

Which of these is the best film analogy of an epigenetic mark?

A) a note a director makes in the script about an idea for a possible sequel
B) a scene that is completely novel and inserted into an existing script by the director
C) a director's decision to include or exclude a particular scene from the original script
D) small random variations in acting performance during multiple takes of the same scene