How did Earth come to have an oxygen atmosphere?A. Precambrian rocks released oxygen into the atmosphere. B.Volcanoes released oxygen into the atmosphere. C.Early organisms created oxygen from other gases in the atmosphere. D.Oxygen was the primary gas originally in Earth's atmosphere.

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."

pv=nrt

explanation: