Why Are Relatively Few Details Known About the Life That

Multiple Choice

Why are relatively few details known about the life that existed on Earth prior to a few hundred million years ago?

A) Many rocks have been transformed by high heat and pressure, destroying any fossils they contained.
B) Older rocks are more rare than younger rocks because of geologic processes like subduction.
C) Nearly all life at that time was microscopic, making it much more difficult to identify.
D) All of the above