Answer: C. Door creaking.
One of the most important elements in film are music and sound effects. These can greatly affect the mood of an audience. If a movie has the right music in the right moments, the audience is more likely to be involved in the story, and to feel the emotions that the director wants the spectators to feel. For example, a door creaking could serve as a way to foreshadow a dark event, and to create a feeling of anticipation and fear.