A 23-year-old woman presents to the ED. She complains of 3 to 4 days of low abdominal pain, fever, nausea, and vomiting. She has normal bowel movements. The patient reports a history of an ectopic...

A 23-year-old woman presents to the ED. She complains of 3 to 4 days of low abdominal pain, fever, nausea, and vomiting. She has normal bowel movements. The patient reports a history of an ectopic pregnancy, several sexual partners, as well as a chlamydial infection 3 months ago. Her last menstrual period was 9 days ago. Her exam is notable for cervical motion tenderness and RLQ abdominal pain. Which of the following is the likely diagnosis? A. Right ectopic pregnancy B. PID C. Gastroenteritis D. Renal calculi E. Crohn disease