Other than personal appearance, what are the other four nonverbal message channels that we use to communicate? a. personal political views; personal hygiene; group identification; and impersonal (public) space b. covert body movements; personal hygiene; impersonal (public) space; and status c. physical characteristics; body movement or stillness; personal possessions; and personal preferences about spending time d. personal space; social space; and impersonal (public) space; and time