On examining an older male patient, you discover complete anesthesia on the sole of the left foot.The patient tells you that this has been the case since sustaining a grenade blast in Vietnam, with...

On examining an older male patient, you discover complete anesthesia on the sole of the left foot.The patient tells you that this has been the case since sustaining a grenade blast in Vietnam, with shrapnel hitting his back in multiple locations. He has healed since surgical removal of the shrapnel and is not bothered by this lack of sensation.What might explain this finding?

A. Sciatic nerve injury

B. Left dorsal L4 nerve root transection

C. Left ventral S1 nerve root transection

D. Left dorsal L5 nerve root transection

E. Left dorsal S1 nerve root transection