Which statement accurately describes spinal nerves?

A) Most spinal nerves are motor nerves.
B) Each spinal nerve is mixed in that it contains some sensory axons and some motor axons.
C) All spinal nerves are sensory nerves.
D) Odd-numbered spinal nerves are sensory and even-numbered spinal nerves are motor.
E) Spinal nerves are central axons contained within the vertebral canal.