The answer is All of the above
Answer: The option that is true regarding Carl's use of substances is D) All of these choices are true.
Explanation: All of the choices provided about Carl's use of substances are true. First, he shows that he has characteristics of addictive behaviour when <u>he denies that he has a problem with drug use, when he boasts about his capacity to drink alcohol, and when he dismisses the risks of mixing alcohol and drugs.</u> Moreover, Carl has a substance abuse problem<u> he desires to drink and use drugs day and night and even to mix the substances</u>. He also has a substance dependence problem because, <u>when he is not drinking, he is using "speed" and, when he needs to sleep, he takes Valium.</u> In that way, Carl has both substance abuse and substance dependence problems and he also behaves as an addict.
