Why Was the Perspective Followed by Wilhelm Wundt and His

Why was the perspective followed by Wilhelm Wundt and his followers called structuralism?

A) They wanted to identify the major brain structures.
B) Their primary goal was to understand the physiology of the mind.
C) They focused their efforts on analyzing the elements of the nervous system.
D) Their primary focus was on breaking the mind down into its most basic elements to understand its basic structure.