The technique is called Paradigms. Its a style of abstract which is formed by painting on a 3D design reference.
Whats the question? You have to show a picture of the question i may know it
The best answer to the question '<span>The artists of the Mexican muralist movement mixed classical and modern art techniques in a style of..' would be letter b. social realism. The theme of the movement is social realism wherein the artworks mostly send a political and social opinion of the artist.</span>