In the Early 20ᵗʰ Century,because Psychologists Felt That Theories Should

In the early 20ᵗʰ century,because psychologists felt that theories should be based on publicly observable and replicable data,there was a shift away from studying internal (cognitive) events towards studying external,publicly observable events.What was the term classifying this change in emphasis?

A) Group psychology
B) Evolutionary social psychology
C) Behaviourism
D) Social cognition