Which sentence describes the impact of the great oxidation

Last updated: 4/28/2023

Which sentence describes the impact of the great oxidation event A It caused existing cyanobacteria to switch from aerobic to anerobic respiration B It caused the disappearance of red banded rocks because no more oxygen interacted with iron compounds C It reduced the level of oxygen and increased the level of carbon dioxide in the atmosphere OD It caused many organisms to die off because oxygen was toxic to them