Lucas paints people in the waiting area of an emergency ward at a hospital. He emphasizes a sense of anxiety in the postures and facial
expressions of the people waiting. He even paints the inanimate objects
in the room in a way that makes them appear to vibrate with menace,
extending the feeling of anxiety to the entire scene. What is the role of
anxiety in Lucas's painting?
A. It's an idea.
B. It's the theme.
C. It's the subject.
D. It's a symbol