Which of the Following Is True of Informal Workplace Talking

Which of the following is true of informal workplace talking?

A) Most people are aware of the need to improve their talking ability.
B) Voice quality refers to a set of voice behaviors that gives each person a unique voice.
C) All people with effective informal talking skills have the same style.
D) The larger a person's vocabulary, the more word choices he or she has.
E) Adaptation refers to the pitch and resonance of the sounds a speaker makes and the sounds an audience hears.