i had to look at it a few on b and c because i thought it could be c but got to looking more and its b, because yes it uses some neutral colors in it but green is not a neutral color it is a secondary color and its using both secondary and neutral colors and the answers d and a to me anyway seemed like to simple and their trying to throw u off because yes their are lively brushstrokes and daps but thats a throw off answer and a, there are not defined shapes in there but the bridge if u want to count that as a shape and the trees arent a shape so that would only leave u with answer b
Monet was an impressionist painter. The impressionists were known for painting with lively brushstrokes and dabs of pure color. However, this particular piece seems to have muted shadows and neutral colors. I think the answer is C.
FYI Chiaroscuro is a technique that features contrasts in lighting and dark. Orthogonal lines and one point perspective puts a vanishing point at the center. You would need buildings or other straight lines to have this.