Answer:
C. Johann Sebastian Bach was a great organist and writer
Step-by-step explanation:
Let's use the process of elimination:
It is not A because Mozart did compose music for the piano
It is not B because the paragraph is about Bach, not the piano and when it was invented
It is not D because D is just a detail in the paragraph
This question is a little bit tricky, but it doesn't mean that you are not smart! Love yourself! :)