According to the Definition of Learning,how Could a Researcher Ever

Multiple Choice

According to the definition of learning,how could a researcher ever show that cognitive learning had taken place in a subject?

A) Only by asking the subject if he or she had learned something.
B) By measuring a behavioural change that could directly be tied to a previous experience.
C) By measuring the brainwave pattern of the subject.
D) Through the process of elimination-by showing that the person had not learned through classical or instrumental conditioning.