In which areas did D.W. Griffith experiment in his filmmaking?

D.W. Griffith is celebrated as a pioneer in the film industry, particularly for his innovative techniques that significantly advanced narrative storytelling in cinema. His experimentation with close-ups allowed him to emphasize character emotions and make the audience feel a stronger connection to the narrative. The use of fade-outs contributed to smoother transitions between scenes, enhancing the flow of storytelling.

Additionally, flashbacks were utilized by Griffith to delve into characters' pasts and add depth to the narrative structure, allowing for a more complex storyline. Cross-cutting, or editing together two or more scenes occurring simultaneously in different locations, created tension and suspense, a technique that has become a standard in filmmaking.

These elements were pivotal in establishing a more dynamic approach to cinematic language and storytelling, thereby revolutionizing how stories were told on screen. Other options, while they address valuable aspects of filmmaking, do not align with Griffith's most notable contributions and innovations in the early development of film narrative techniques.