Most people think that Johann Sebastian Bach played the piano, but this is not true. The piano was not invented until just two years before he died. Bach's main instrument was the organ. He was a great organist. He wrote a lot of wonderful music for that instrument. He also played other keyboard instruments that were ancestors of the piano. Among these instruments was the harpsichord. Along with Mozart, Bach is considered to be one of the all-time great composers.

Question

What is the central idea of this paragraph?
A.
The harpsichord was a keyboard instrument before the piano.
B.
The piano had not been invented three hundred years ago.
C.
Mozart and Bach did not compose music for the piano.
D.
Johann Sebastian Bach was a great organist and writer.
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Answer 1

The central idea of the paragraph is:

D. Johann Sebastian Bach was a great organist and writer.