How does Leonardo da Vinci's technique of sfumato work? OA. It draws the viewer's eyes to the vanishing point by using special lines that are almost invisible. OB. It creates a gentle transition from one image to another by outlining them in a fine haze. OC. It transforms a painting by using 'smoke" or lightly drawn, wispy forms that look like smoke. D. It creates a shocking transition from one image to another by outlining them in rigid lines.​