Which of the following pieces of information, if true, would pose the BIGGEST challenge to the author’s assertion that the passenger's spinal disc "was indeed injured in the car accident"? A
Back pain can have many different causes including acute trauma, heredity, and long term behavioral patterns.

B
An MRI is an expensive medical procedure that some argue is performed with unnecessary frequency.

C
Neck pain is the most common complaint of those injured in car accidents; coming in a close second is the complaint of back pain.

D
Nearly everyone over the age of 40 has some evidence of at least one herniated disc, which may or may not be linked to back pain.

E
Back pain can be difficult to diagnose, since a person can always claim to feel pain that appears to have no identifiable cause.