In the 19th Century, Wilhelm Wundt Attempted to Shape the New

In the 19th century, Wilhelm Wundt attempted to shape the new discipline of psychology along the lines of physics, because in his era physics was admired as a "model" science. Wundt's attempt to imitate physics illustrates which of the textbook's unifying themes?

A) Psychology evolves in a sociohistorical context.
B) Psychology is theoretically diverse.
C) Our experience of the world is highly subjective.
D) Behaviour is determined by multiple causes.