Which school of psychology suggests psychologists should study only what can be objectively observed

A)  humanism 
B)  behaviourism 
C)  structuralism 
D)  functionalism

Behaviourism

A psychological theory that studies observable behavior as the primary source of scientific information, disregarding the importance of mental states.

Objectively Observed

A manner of observation that is based on unbiased facts and evidence, devoid of personal feelings, interpretations, or prejudice.

Structuralism

An approach in psychology and sociology that explores the elements of human culture, thought, and experience, emphasizing the idea of underlying structures.