Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Music, artful arrangement of sounds (1) ______ time. This definition is obviously very broad, but a narrower one would exclude (2) ______ much. Music is part of virtually every culture on (3) ______ , but it varies widely among cultures in style and structure. Definitions of music can (4) ______ dramatically over a short time, as they have across the world during the 20th (5) ______

Music, artful arrangement of sounds (1) ______ time.