Answer:
Here's one for you too! <3
Explanation:
The introduction of Bach to music had quite an impact. Before Bach, many were ill - tempered and most became well - tempered after Bach. Harmonically speaking, Back's composition were way ahead of time. He introduced unexpected chord changes. He also initiated the keyboard technique that is still used up to date.
1 is d
2 is c and please just ask one question at a time, its annoying to have a lot.