Eric McMaster age 24,is known to be dependent on a variety of chemical substances, including alcohol and cocaine.Which of the following statements is an example of the most common defense mechanism employed by those dependent on chemical substances?

Reasoning: Choice A reason: This statement is an example of rationalization or intellectualization, where the individual tries to justify their use by comparing it to something perceived as "worse." While common, it is not the primary, most pervasive defense mechanism that prevents the individual from acknowledging they have a problem in the first place. Choice B reason: This statement is actually an admission of self-medication and a degree of insight into why the substance is being used. It does not represent a defense mechanism designed to shield the ego from the reality of addiction, but rather an explanation of the substance's functional role in the patient's life. Choice C reason: This is an example of projection or rationalization, where the individual minimizes their behavior by suggesting it is socially normative. By claiming "everyone does it," the patient avoids personal accountability, but it is not as fundamental to the addictive process as the complete rejection of reality. Choice D reason: This is a classic example of denial, which is the most common defense mechanism in substance use disorders. Denial involves the outright refusal to acknowledge the existence of the problem or the extent of the use. It serves as a protective barrier that prevents the individual from seeking necessary treatment.