Answer:
c. is unobservable
Step-by-step explanation:
According to the behaviorist, learning occurs mostly through observation. They believed a person learns various aspects of his or her life through ways of observation. the process of observation includes imitation, modeling, etc. Behaviorists demonstrated various studies that demonstrate behavior is a learned process such as experiments on classical conditioning. Whereas, cognition refers to the mental processes that involve comprehension and knowledge.
In the past, behaviorists were not likely to view cognition as a part of learning because cognition is unobservable.