Which Statement Best Summarizes the Development of the Geologic Time

Multiple Choice

Which statement best summarizes the development of the geologic time scale?

A) Numerical ages for rocks were known well before the relative sequence of sedimentary layers was established.
B) Relative ages for sedimentary strata were known well before accurate numerical dates for these rocks could be provided.
C) Names of relative ages (such as Silurian) and accurate numerical dates for these ages appeared at about the same time.