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．the distinction between fine art and folk art
B．the characteristic of fine art
C．the characteristic of folk art
D．the advantages of fine art over folk art