Post-Impressionism is a term used to describe the reaction in the 1880s against Impressionism. It was led by Paul Cézanne, Paul Gauguin, Vincent van Gogh and Georges Seurat. The Post-Impressionists rejected Impressionism's concern with the spontaneous and naturalistic rendering of light and color.
C. both the aesthetics and stability of the structure
I think it might be B, I remember reading that somewhere, but the whereabouts allude me. I hope I helped :)
I am pretty sure at 10 am. Sorry If wrong.