19. Mrs. Smith a 30-year-old housewife has a severe pulsating pain on the left side of the head, which has been present for more than 48 hours with nausea and phonophobia; she has some numbness on the left side of the face. Mrs. Smith reports having this type of headache since she was 18-tears-old and usually has one headache per month. Mrs. Smith’s physical examination results are normal. Which of the following types of primary headache is Mrs., Smith most likely experiencing? A. Cluster headache B. Episodic tension-type headache C. Chronic tension-type headache D. Migraine