Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'geologic time unit'?

A. The largest defined unit of time is the the concept, composed of eons.] [Wikipedia]
B. Epochs are divided into ages [millions of years] [Wikipedia]
C. The subdivisions of geologic time. The table of geologic time spans are dates and nomenclature defined by the International Commission on Stratigraphy. [Wikipedia]
D. Eras are divided into periods. [Wikipedia]

Answer: The subdivisions of geologic time. The table of geologic time spans are dates and nomenclature defined by the International Commission on Stratigraphy. [Wikipedia]