**Core Concept**
The patient's presentation suggests a complex interplay of psychological, behavioral, and physiological factors contributing to his clinical condition. The patient's history of frequent tardiness, irritability, and substance abuse, along with a recent stressful event (mother's death), points towards a diagnosis of a psychiatric disorder.

**Why the Correct Answer is Right**
The patient's symptoms, including irritability, clenched fists, and teeth grinding, are characteristic of a state of heightened physiological arousal. This, combined with his history of substance abuse and recent stressful event, suggests a diagnosis of **Kleptomania**. Kleptomania is a psychiatric disorder characterized by recurrent failure to resist urges to steal objects that are not needed for personal use or for their monetary value. The patient's behavior is likely driven by a coping mechanism to deal with stress and emotional distress.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because there is no clear indication of a primary sleep disorder, such as insomnia or sleep apnea, based on the patient's presentation.

**Option B:** This option is incorrect because there is no clear indication of a primary anxiety disorder, such as generalized anxiety disorder or panic disorder, based on the patient's presentation.

**Option C:** This option is incorrect because there is no clear indication of a primary substance use disorder, such as alcohol dependence or substance-induced psychosis, based on the patient's presentation.

**Clinical Pearl / High-Yield Fact**
The patient's behavior is likely driven by a coping mechanism to deal with stress and emotional distress, highlighting the importance of considering psychiatric comorbidities in patients with complex presentations.

**Correct Answer:** C.