Which of the following statement regarding Operant Conditioning by B.F. Skinner is correct?I. Positive reinforcement occurs when removal of an aversive or unpleasant stimulus following an emitted behaviour strengthens the occurrence of the behaviourII. Negative reinforcement involves the representation of a pleasant stimulus followed by an emitted behaviour which strengthens the occurrence of the behaviour

• A. Neither I nor II
• B. Only I
• C. Only II
• D. Both I and II