The correct answer is D. post-impressionism.
Cubism, a major movement in abstract art, was heavily influenced by the works of post-impressionist painters such as Paul Cézanne and Georges Seurat. Post-impressionists sought to break away from the naturalism of impressionism and explore new ways of depicting reality, often using geometric forms and bright colors. This emphasis on form, structure, and color had a significant impact on the development of cubism, which also relied heavily on the use of abstract shapes and colors to convey meaning. While African sculpture and Japanese ukiyo-e also played a role in the development of cubism, the movement's most significant influences came from the works of post-impressionist painters.