ou are seeing a 56-year-old patient who presents with daily headaches for the past two weeks. He describes them as an intense pressure behind both eyes that is throbbing in nature. He reports that lights and loud noises bother him , but he has been able to tolerate his usual activities as a short-haul truck driver. The headaches tend to last all day. He has not had nausea, visual changes, fever, or chills, though he has had rhinorrhea. He read online about cluster headaches, and he thinks that is what he is experiencing. What aspect of this patient’s story is most typical of cluster headaches? A. His pain is periorbital and bilateral. B. His photophobia and phonophobia. C. The throbbing quality of his pain. D. They are associated with rhinorrhea E. They typically last all day