In a Jefferson fracture, what measurement suggests the potential interruption of the transverse ligament, and what indicates an unstable fracture?
A) >5 mm offset, avulsion fragment off inner C1 pillar
B) >7 mm offset, avulsion fragment off inner C1 pillar
C) >5 mm offset, disruption of the odontoid process
D) >7 mm offset, disruption of the C2 vertebra