Bizhan believes that the image of a flame makes the best metaphor for the play he's designing. The play is about the cleansing process of pushing yourself through something difficult. He thinks the phrase "trial by fire" is fitting, and that the image of a flame, plus the colors of fire, will make a unifying visual theme. What is Bizhan MOST likely working on?
A. design concept
B. mise en scene
C. realism
D. perspective painting