Informal settings tend to cause us to our nonverbal behaviors.

Answer Expand and relax
Communication effected by means other than words assuming words are the verbal element When there are nonhuman factors in the environment that communicate certain things to people. Thus, people tend to change them to accomplish specific goals, and environments can affect peoples' moods, choice of words and actions. to coordinate own verbal and nonverbal behavior in production of our messages, and to coordinate verbal and nonverbal message behavior with those of interaction partners.

Apolitical machine ~ apex 

Icould be wrong but i would say b.