The habit of continued drinking of alcohol most clearly illustrates the power of immediate reinforcement, which means option D is the right answer.
Alcohol consumption in excess amount is harmful for the body as it affects liver and kidney. People tend to consume alcohol and other addictive drugs because of the feeling of euphoria which they get and that makes them forget their anxiety and pain. Positive reinforcement is the condition when the use of an item strengthens the likelihood of a typical response which adds a characteristic stimulus soon after the behavior is performed.
Alcohol consumption has a negative reinforcement because when the person tries to avoid its consumption, it drives him mad and the person may lose their consciousness and mental control. Aggression and hypertension may also be assisted in this. Hence, Boris's habit of continues drinking has severely affected his brain which demands immediate reinforcement.
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