Leonardo da vinci's technique of sfumato allows painters to

It allowed painters to do the fine shading that produces soft, imperceptible transitions between colours and tones.

The "maple leaf rag" (copyright registered on september 18, 1899)[1] is an early ragtime musical composition for piano composed by scott joplin. it was one of joplin's early works, and became the model for ragtime compositions by subsequent composers. it is one of the most famous of all ragtime pieces.[2] as a result joplin was called the "king of ragtime". the piece gave joplin a steady if unspectacular income for the rest of his life.

The right answer for the question that is being asked and shown above is that: "b. middle byzantine"this painting entitled, the old testament trinity, is an example of  middle byzantine  art.  middle byzantine arts are mostly religious related ones that depicts the faith of christianity.