Little is known about much of earth’s early history because ____.
a. precambrian rocks have been deeply buried
b. precambrian rocks have been changed by heat and pressure
c. precambrian soft-bodied life-forms weren’t often preserved as fossils
d. all of the above

Little is known about much of earth’s early history because Precambrian rocks have been deeply buried they have been changed by heat and pressure ,Precambrian soft-bodied life-forms weren’t often preserved as fossils.

What is Precambrian rocks?

The Precambrian is the earliest part of Earth's history, set before the current Phanerozoic.

Why are Precambrian rocks rare?

Fossils are rare in Precambrian rocks mostly because Precambrian life-forms lacked bones, or other hard parts that commonly form fossils.

Hence, D is correct option

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Little is known about much of earth’s early history because ____. a. precambrian rocks have been deeply buried b. precambrian rocks have been changed by heat and pressure c. precambrian soft-bodied life-forms weren’t often preserved as fossils d. all of the above

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Little is known about much of earth’s early history because ____.
a. precambrian rocks have been deeply buried
b. precambrian rocks have been changed by heat and pressure
c. precambrian soft-bodied life-forms weren’t often preserved as fossils
d. all of the above