Interesting, Aaron, but I'd challenge the note question.
Notes aren't higher or lower than each other - they're simply arbitrary names given to the tones in a scale. Pitches are measured in Mhz and are higher and lower. The two notes played are both C, an octave apart. But the pitch of the final C is higher than the pitch of the lower C.
The question asked "which note is higher?" Since a high C is higher in pitch than a low C, the question is misleading. The answer they sought was the two notes were the same - which they were - they were both C's. But the second note was higher in pitch. That question should definitely be jettisoned from the test.
Otherwise fun - thanks!