The author's attitude toward folk art is ______.

A．Fine art is purely decorative.
B．Fine art is often traditional in composition and subject.
C．Singing is considered to be fine art.
D．The quality and quantity of fine art will decrease with industrialization.

A．Folk art is the product of professionals who have studied art.
B．Decorating a wooden beam is folk art.
C．Paintings on the walls of churches are usually considered folk art.
D．People at a music concert are creator of folk art.