Name two or three musical innovations that actually set the baroque apart from music history up that that point?

The three musical inovations that set Baroque apart from music history up were counterpoint, seriousness and impressive grandeur, and harpsichord

Explanation:

The Baroque was a dignified seriouness and impressive grandeur musical style. The piece or movement would tipically have only one  musical subject, which would then be worked out in a number of voices according to the principles of counterpoint.

The harpsichord or pipe organ basso continuo role in orchestra during the Baroque era.

a. symbolism

b. opinions

all of them

c. hidden messages

d. political statements