The correct options are
B Their expertise is required while creating historical film sets.
C Scriptwriters need their assistance while dealing with subjects that pertain to historical events.
Knowledge of history is a key component in the making of historical works of art. Filmmakers often make use of historians and their expertise while attempting to create accurate historical backdrops for their narratives and storylines. Their knowledge of history is also useful for the scriptwriting process, and the prop and costume departments, which require assistance with elements such as context, language, culture, and more.