China's poetry is mature.

A

Analysis of test questions: Poetry originated from ancient social life and is a rhythmic and emotional language form due to labor production, sex and primitive religion. Poetry is a kind of language art, which is differentiated from songs, and songs are a kind of music literature with a long history. The Book of Songs is sung with music. Technically, it is a song. Because of this, The Book of Songs is regarded by scholars as a symbol of the maturity of China's music and literature poetry.