What answer below best describes an octave?

a. The exact same pitch played by two different instruments. b. Two completely different pitches played by two different instruments at contrasting volumes. c. The generic pitch played by two instruments but in different registers. d. pitch based on any two but different scale degrees of an eight-note major or... show more a. The exact same pitch played by two different instruments.
b. Two completely different pitches played by two different instruments at contrasting volumes.
c. The generic pitch played by two instruments but in different registers.
d. pitch based on any two but different scale degrees of an eight-note major or minor scale.
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