Geology Can Be Divided into Two Major Time-Related Disciplines: Physical

Geology can be divided into two major time-related disciplines: physical geology and historical geology. Physical geology is the study of the materials the planet is composed of and the present day processes that operate on the surface and within the earth's deeper layers. Historical geology is the study of the earth's 4.6 billion year history, its formation, development, and evolution. Historical geologists strive to create a time-line of events that have occurred since the earth's formation. Alan D. Sills, Earth Science the Easy Way

A) Nonargument.
B) Argument; conclusion: Historical geologists ... since the earth's formation.
C) Argument; conclusion: Physical geology ... the earth's deeper layers.
D) Argument; conclusion: Geology can be divided ... historical geology.
E) Argument; conclusion: Historical geology ... development, and evolution.