A 50 year old patient is admitted to the emergency department with severe lower back pain, weakness, and atrophy of her leg muscles. Suspecting a herniated disk, which diagnostic test should you order?
A. CXR, MRI, CT scan
B. Lumbar puncture, CDR, MRI, CT scan
C. Lumbar puncture, CDR, myelography
D. Myelography, MRI, CT scan