Psychologists Need to Use Agreed-Upon Measurement Tools So That Other

Multiple Choice

Psychologists need to use agreed-upon measurement tools so that other researchers can objectively evaluate the results of the research.Which underlying theme does this aspect of psychology illustrate

A)  Behaviour is determined by multiple causes. 
B)  People's experience of the world is highly subjective. 
C)  Psychology evolves in a sociohistorical context. 
D)  Psychology is empirical.