**Core Concept**
Cannabis withdrawal is generally mild and self-limiting, unlike other substances such as alcohol or opioids, which involve significant neurobiological dependence and require symptomatic management. The key distinction lies in the absence of severe physiological or psychological symptoms during cannabis withdrawal.

**Why the Correct Answer is Right**
Cannabis withdrawal is characterized by mild, transient symptoms such as irritability, insomnia, and decreased appetite, which typically resolve within days without pharmacological intervention. Unlike alcohol or morphine, cannabis does not cause significant neuroadaptations in the brain’s reward system or central nervous system that necessitate symptomatic treatment. There is no established evidence for effective pharmacological agents to treat cannabis withdrawal, and most symptoms resolve spontaneously.

**Why Each Wrong Option is Incorrect**
Option B: Morphine withdrawal involves severe autonomic and psychological symptoms including agitation, muscle pain, nausea, and seizures, requiring symptomatic treatment with medications like benzodiazepines or methadone.
Option C: Alcohol withdrawal can lead to delirium tremens, seizures, and autonomic hyperactivity, which are life-threatening and demand immediate medical intervention.
Option D: Cocaine withdrawal causes anxiety, fatigue, and intense cravings, with symptoms that may require supportive therapy and sometimes medications like clonidine.

**Clinical Pearl / High-Yield Fact**
Cannabis withdrawal is the least severe among commonly abused substances and rarely requires medical treatment — students should remember that **cannabis withdrawal is self-limiting and symptomatic treatment is not needed**.

✓ Correct Answer: A. Cannabis