Answer:
Option A is the best answer.
The more unbalance the more interesting people find it. If it's all symmetrical the eye won't be drawn anywhere in particular .
Answer:
Determine size (by counting lines and spaces between the notes)
Determine if the top note is in the major scale of the bottom note.
If it is: the interval is perfect (if it is a unison, fourth, fifth, or octave) or it is major (if it is a second, third, sixth, or seventh)
The significance is that the building is bleak and boring but the angles and curves show the unpredictable pattern that nature tends to take, the inane ways that life happens, and the way that the human psyche is so easily shaped by these events.
Furthermore they are a Post-Modernist expressionist type of feature.