What Aspect of Structuralism's Principles Do We Still See Today

Multiple Choice

What aspect of structuralism's principles do we still see today in psychology?

A) Introspection can be a valuable tool in combination with more scientific techniques.
B) We can learn a lot about mental processes by studying what happens when they fail.
C) Psychological research should focus on observable behaviour.
D) The idea that there are many influences on behaviour and that we are only aware of a subset of them.