A patient who was involved in an altercation was struck on the side of the head with a baseball bat, in addition to suffering several blows to the arms and legs. When assessing this patient, which sign or symptom best indicates the patient has suffered a brain injury?

A) Confusion and combativeness
B) Complaint of a headache
C) Ecchymosis to the side of the face
D) Weakness to both arms

A) Confusion and combativeness