Which of the following is accurate about cluster headaches? A: Typically, a patient experiences one or two cluster periods per year, each lasting 2 weeks to 3 months B: During an attack of cluster headache, most patients find relief by lying down and exhibit minimal movement and activity. C: The pain in cluster headaches is bilateral and is often associated with keratitis sicca D: Most patients with episodic cluster headache eventually develop chronic cluster headache