Which of the following shows the four time divisions listed from oldest to youngest? choose one:
a. phanerozoic, precambrian, mesozoic, cenozoic
b. precambrian, paleozoic, mesozoic, cenozoic
c. precambrian, mesozoic, archean, cenozoic
d. hadean, cenozoic, mesozoic, proterozoic

B. Precambrian, Paleozoic, Mesozoic, Cenozoic

Explanation:

There are 4 main time divisions (from the oldest to the youngest): Hadean, Archean, Proterozoic and Phanerozoic eons and periods. But Hadean, Archean and Preterozoic periods are added to the Precambrian supereon period. The Eons contains from eras and they also contain from periods, epochs and ages as well.

So the tree of the time periods from oldest to youngest with subdivisions respectively:

1) Hadean has these subdivisions: Pre Nectarian and Nectarian

2) Archean has these subdivisions: Eoarchean, Paleoarchean, Mesoarchean, Neoarch

3) Proterozoic has these subdivisions: Paleoproterozoic, Mesoproterozoic, Neoproterozoic

4) Phanerozoic has these subdivisions:  

4.1 Paleozoic Era (Cambrian Period, Ordovician Period, Silurian Period, Devonian Period, Carboniferous Period, Permian Period)

4.2 Mesozoic Era (Triassic Period, Jurassic Period, Cretaceous Period)

4.3 Cenozoic Era( Paleogene Period, Neogene Period, Quaternary Period)

Now after we have this table about the all periods , we could choose the truest variant.