According to the Text, Studying the Patterns and Importance of Sounds

According to the text, studying the patterns and importance of sounds as spoken by a group of people helps linguistic anthropologists:

A) establish local kinship patterns.
B) identify how emotions are conveyed through nonverbal communication.
C) locate the eldest members of a community.
D) understand the elements and rules of a particular language.
E) determine how long a specific language has existed.