Ninety percent of life's history in the geological time scale is occupied by the
a. hadean eon.
b. archean eon.
c. proterozoic eon.
d. precambrian supereon.

Which of the following was a major outcome of european imperialism in africa after the industrial revolution? o a. the area around the suez canal experienced decades of military conflict o b. africans in the belgian congo suffered forced labor and oppression o c. the discovery of rich matural resources led to african economic prosperity. o d. europeans brought disease to central africa, killing thousands.