Why does the Precambrian have fewer subdivisions in the geologic timescale than the Phanerozoic? A. The Phanerozoic had more dinosaurs than the Precambrian.
B. There were fewer rock strata in the Precambrian.
C. Life was less diverse during the Precambrian.
D. The Mesozoic saw an explosion of different rock strata that could be correlated by mineral type.
E. All of the above.