Voice leading

I-V in C major

I-V in C minor

V-I in C major

I-IV in A major

i - V - V - i in D minor

i - vii - V- i in D minor

vi - V - III - vi in Bb major

None of the above

Plagal cadence in A minor

Cadential cadence in A minor

Plagal cadence in C major

Perfect cadence in B# major

No it's beautiful

Parallel octaves

Tritone

Parallel octaves and tritone

No it's beautiful

Augmented 2nd

Parallel 5ths

This has gone horribly wrong

No it's beautiful

Augmented 2nd

Parallel octaves and fifths

Everything it's all gone terribly wrong

The root

The third

The fifth

The tonal degree

Double the root for both chords

Double the third of VI

Double the third of V

You avoid it at all cost

The supertonic moves to the leading note

Double the leading note

Double the third of chord ii

The leading note always resolves up in an exposed voice

The leading note should be doubled wherever possible

In minor keys, moving from scale degree 6 to the leading note creates an augmented 2nd