Which geologic period lasted for almost 7/8 of earth’s history?

a. the precambrian time

b. the phanerozoic eon

c. the carboniferous period

d. the quaternary period

I think the correct answer from the choices listed above is option A. The geologic period which lasted for almost 7/8 of earth’s history would be the Precambrian time. This period covers about 90% of the entire history of the Earth. It happened about 4.6 billion years ago. Hope this answers the question.