What caused the oxygen levels in Earth’s atmosphere to increase during the Precambrian time? Choose the correct answer. Land plants evolved and released oxygen as they grew.

The chemical weathering of granite released large quantities of oxygen.

Oxygen dissolved in the ocean was released by osmosis into the atmosphere.

Cyanobacteria consumed carbon dioxide and released oxygen as a waste product.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.