I think B is correct. It says as much at the bottom of of the second paragraph of the write up beside the worksheet.
Answer: Over the next few years, Mexico’s new government commissioned a number of artists to paint large scenes, or murals, on the walls of many schools, churches, and museums. These murals were meant to present Mexico’s history in a way that could educate a largely illiterate population. (At the time, only about 10 percent of Mexicans could read). The artists used bright colors and a bold figural style to depict scenes from ancient and modern Mexico.
The theater of cruelty was founded by French playwright, Henry Becque. Antonin Artaud, originally a member of the surrealist movement, is a main contributor to this genre and began to write his own theatrical theories.