What is the most logical next event?

There's an artist painting a square canvas board with several acrylic colors using a flat brush in a studio. she

OPTIONS:
a). is painting a christmas tree with a piece of acrylic text..
b). moves the brush across the screen several times..
c). shows how to cut the paint with the flat brush when time stops..
d). begins by painting blue strokes with the flat brush on the canvas surface..
d).