APFIVE Augmented Mediant Chord Function
In what way does the use of a III+ chord in a minor key challenge the typical function of the mediant chord?
A
It introduces chromatic alteration, shifting the chord’s role from predominantly diatonic to a more dominant-like function
B
It transforms the mediant into a subdominant chord, contradicting its usual tonic-prolonging role
C
The III+ chord weakens the mediant’s ability to serve as a predominant, forcing it to act as a passing chord
D
It changes the mediant’s harmonic function to that of a Neapolitan chord, altering the key’s tonal center
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