Which of the following artists pioneered Cubist art

A．It is the world of dreams experienced by Picasso.
B．It expresses the painters' good will for world peace.
C．It had never been explored by anyone before Picasso.
D．Guernica was the best illustration of the surrealist world,

A．one has only himself to blame for not being able to understand something
B．he didn't expect that everyone could understand the surrealist art
C．everybody should be able to learn, to appreciate the surrealist art
D．the intricacy of the surrealist art should not be blamed on the artists