Which psychologist proposed that the study of consciousness should be replaced by the study of behaviour

A)  G. Stanley Hall 
B)  John B. Watson 
C)  Sigmund Freud 
D)  Abraham Maslow

Study of Behaviour

The scientific investigation of actions or reactions of humans or animals in response to external or internal stimuli.

Consciousness

The state of being awake and aware of one's surroundings, thoughts, feelings, and self.

Psychologist

A professional specializing in the study of mind and behavior, including aspects of conscious and unconscious experience as well as thought and emotion.