1. At what level along the vertebral column is a needle inserted for a lumbar puncture, and what landmark is used to find this level?
A. Between L1 and L2 or L2 and L3, above the supracristal line
B. Between L3 and L4 or L4 and L5, at the level of the umbilicus
C. Between L3 and L4 or L4 and L5, just above or below the supracristal line
D. Between L1 and L2, at the level of the umbilicus
E. Between C7 and T1, below the vertebra prominens