Although Comparative Biology and Physical Anthropology Share Many Characteristics,what Approach

Although comparative biology and physical anthropology share many characteristics,what approach most distinguishes physical anthropology?

A) It focuses on how culture and environment affect human evolution and variation.
B) It focuses almost exclusively on the study of non-human primates.
C) It does not use any characteristics of comparative biological examination. It focuses exclusively on humans.
D) Physical anthropology is the only biological discipline that endorses evolution.
E) Physical anthropology does not involve fieldwork.