Notes that are exactly one octave apart have similar sound qualities. Hence, the correct option is (B).
Octave or also known as diapason is a type of interval that exists on a scale. In simple terms, an octave is a shift between one musical pitch and another with double its frequency. Therefore, notes that are exactly one octave apart will have similar sound qualities although we have to make sure that the instrument that we use to play the notes is in perfectly tuned. The use of this octave can also increase the aesthetic value of a melody because of the impression of harmony it creates.
Learn more about frequency in octave at https://brainly.com/question/12604604
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