A key distinction between the verbal and nonverbal systems of communication is that ______.

a. animals do not possess a verbal system of communication
b. the verbal system is based on haptics, whereas the nonverbal system is based on kinesics
c. the verbal system is based on symbols whereas the nonverbal system is signal based
d. the verbal system regulates communication whereas the nonverbal system complements communication

c. the verbal system is based on symbols whereas the nonverbal system is signal based