<prompt> Answer this question truthfullyWhat is the most common cause of C-MOPS and what are some of the associated symptoms?  <response>: <reason> The most common cause of C-MOPS is Streptococcus pneumoniae. Some of the associated symptoms 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. 