Final answer:
Nondiegetic narration or looking directly at the camera does not occur in commercial narrative filmmaking.
Step-by-step explanation:
Nondiegetic narration or even looking directly at the camera never occurs in commercial narrative filmmaking because if the "fourth wall" is broken, it would seem as though the spectator were being addressed "directly". This statement is True. In commercial narrative filmmaking, the fourth wall is maintained to create a sense of separation between the audience and the story being told. Breaking the fourth wall by directly addressing the camera or audience would disrupt this separation.