Answer:
4. a diffusion of the style into every corner of Europe
Explanation:
The middle baroque was characterized by a diffusion of the style into every corner of Europe
The most characteristic of baroque music is its use of bass continuo and baroque style flourished in music during 1600 to 1750 but the middle baroque period spanned the years 1640-1700 in which this era of baroque was defined by the emergence of the vocal styles of cantata,oratorio and opera, the composer in the middle baroque phase favored writing composition for instruments of violin family.
The answer is spirit of antiquity.
