Which of the Following Statements Correctly Differentiates Between Structuralism and Functionalism

Which of the following statements correctly differentiates between structuralism and functionalism in early psychology?

A) Functionalism focused on the elements of the mind;structuralism focused on the purpose of thoughts.
B) Functionalism focused on the functions of the mind;structuralism focused on the functions of behavior.
C) Functionalism relied on introspection;structuralism relied on a stream of consciousness.
D) Functionalism was about the "why" of the mind;structuralism was about the "what" of the minD.