Concept:In drama, “cast” refers to the group of performers assigned to roles.Explanation:The word “cast” in theatre and literature denotes the complete list of characters or actors in a play.It includes every character, not just the main ones.Option A matches this definition exactly.Option B describes dialogue, Option C describes the playwright, and Option D is incomplete because it limits the list to protagonists only.Answer:A. a list of all characters in a drama