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Solution
The correct option is CPitch−Frequency;Quality−Waveform;Loudness−Intensity
The pitch of a note is determined by the frequency. The number of vibrations per second is called frequency.
The loudness of the sound heard is determined by the amplitude (intensity). The maximum displacement of a point on a vibrating body or wave measured from its equilibrium position is called amplitude.
The quality of the note is determined by the waveform.