Herniation of an intervertebral disc occurs when:
A) stress on the vertebral column forces a disc into the spinal canal.
B) the spinal column sustains flexion or extension of more than 50%.
C) the spinous process fractures and puts pressure on one or more discs.
D) significant blunt trauma displaces the disc away from the spinal cord.
Answer: A) stress on the vertebral column forces a disc into the spinal canal.
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