In his nursing unit, Nathan's leader encourages employees to voice concerns on a frequent basis, either to the leader or through a private comment box kept in the unit. Most frequently, Nathan finds himself providing anonymous comments that focus on incidents that occurred and policies that need modified to improve patient safety. Which type of voice behavior is Nathan engaging in? O a) Vicarious voice O b) Pessimistic voice O c) Proactive voice O d) Prohibitive voice O e) Promotive voice