Verbal and Nonverbal Codes Are Different in a Number of Ways

Verbal and nonverbal codes are different in a number of ways. Which of the following best describes the difference between verbal and nonverbal codes?

A) Verbal system is based primarily on signs whereas nonverbal system is symbol based.
B) Verbal system is much less restrictive in sending capacity than nonverbal code.
C) Verbal system is governed by a formal grammar whereas nonverbal system is governed by semantics.
D) Verbal codes are always used consciously by people whereas nonverbal codes are always used unconsciously.