What's the result of a normal palpebral reflex? A. A light tap on the medial canthus causes increased tear production. B. A light tap on the lateral canthus of the eye produces vasoconstriction. C. A light tap on the medial canthus of the eye produces a blink of the eyelid. D. A light tap on the lateral canthus of the eye causes the eyeball to retract.