What Best Describes the Character of the Post Office Murals

What best describes the character of the post office murals painted during the Depression?

A) They showed common folk from the region doing common, traditional tasks.
B) They glorified the worker, subtly criticizing big business.
C) They featured patriotic symbols to inculcate loyalty to the federal government.
D) They tended to idealize a better future, rather than focus on themes from the past.