Answer:
I believe it is C: Speaker
Here is a link that might help you http://www.hcs.harvard.edu/~htag/handbook/?q=wiki/sound_systems
Answer:
Baroque era
Explanation:
Johann Sebastian Bach (March 21, 1685, Eisenach, Thuringia, Ernestine Saxon Duchies [Germany]—July 28, 1750, Leipzig) was a Baroque composer who was the most famous member of a big family of north German musicians.
The answer to your question is c