Final answer:
The correct answer to the question is C) Tolerance, which is when a drug user needs to increase the drug's dosage to achieve the desired effects.
Step-by-step explanation:
A frequent drug user finds that larger doses of a drug are necessary to produce the same high. This situation refers to the development of tolerance. Tolerance occurs when a drug user requires more and more of a given drug to experience the same effects that were previously achieved with smaller doses. This is linked with physiological changes in the body, where it adapts to the presence of the drug. Dependence refers to a condition where cessation of drug use results in withdrawal symptoms, which can be both physical and psychological. Addiction is the compulsive use of a substance despite adverse consequences, and often includes both tolerance and dependence. When it comes to the options listed:
- Tolerance is the correct answer, represented by C), indicating the need for increasing doses to achieve the same effect.
- Dependence (option B) refers to the physical or psychological symptoms experienced when a person stops taking the drug.
- Addiction (option A) describes compulsive drug use despite negative consequences.
- Withdrawal (option D) includes a range of negative symptoms when drug use is discontinued.