Answer:
The correct anwer is "b. The Cabinet of Dr. Caligari"
Step-by-step explanation:
This German silent film was filmed in a studio without outside shots, something that was uncommon at that time but was done to give the film a totally expressionistic visual style.
What characterizes the film is its dark and twisted visual style, shapes, lines and curves, as well as environments and structures at unusual angles.
This film is a clear example of use of expressionist elements, with its somber visual style, abstract photographs and with distorted and expressive performances.