<prompt> Answer this question truthfullyWhat is the most common cause of C-MOPS and what are some of the symptoms associated with it?  <response>: <reason> The most common cause of C-MOPS is Streptococcus pneumoniae. Some of the symptoms associated with C-MOPS include conjunctivitis redness and discharge in the eyes, meningitis fever, chills, headache, neck stiffness, otitis media ear pain, pneumonia fever, cough, chills, and sinusitis nasal discharge, sinus tenderness. 