When Assessing a Patient, the Nurse Elicits the Babinski Reflex

When assessing a patient, the nurse elicits the Babinski reflex on the left foot. The nurse knows this response can indicate the existence of:

A) an upper motor neuron lesion on the right side.
B) an upper motor neuron lesion on the left side.
C) a lower motor neuron lesion on the right side.
D) a lower motor neuron lesion on the left side.