Question ID:PT61 S2 Q9 Passage:Musicologist:  Classification of a musical instrument depends on the mechanical action through which it produces music. So the piano is properly called a percussion instrument, not a stringed instrument. Even though the vibration of the piano's strings is what makes its sound, the strings are caused to vibrate by the impact of hammers. Stem:Which one of the following most accurately expresses the main conclusion of the musicologist's argument? Correct Answer Choice:EChoice A:Musical instruments should be classified according to the mechanical actions through which they produce sound. Choice B:Musical instruments should not be classified based on the way musicians interact with them. Choice C:Some people classify the piano as a stringed instrument because of the way the piano produces sound. Choice D:The piano should be classified as a stringed instrument rather than as a percussion instrument. Choice E:It is correct to classify the piano as a percussion instrument rather than as a stringed instrument.