Little is known about much of earth’s early history because ____.
Aprecambrian rocks have been deeply buried
Bprecambrian rocks have been changed by heat and pressure
Cprecambrian soft-bodied life-forms weren’t often preserved as fossils
Dall of the above
Aprecambrian rocks have been deeply buried
Bprecambrian rocks have been changed by heat and pressure
Cprecambrian soft-bodied life-forms weren’t often preserved as fossils
Dall of the above