Impressionist painters created shadows by primarily using option C- by using charcoal. Impressionist artists often used loose brushwork and a technique called "broken color" to convey the illusion of shadows. They would build up layers of color, using small, visible brushstrokes to capture the play of light and create the impression of shadowy areas. Charcoal was a commonly used medium for sketching and preliminary drawing, allowing artists to establish the placement and structure of shadows before applying paint. While they may have used some dark pigments like black or gray paints, it was less common than the use of charcoal.
