-is uncontrollable sleeping that occurs for short periods while a person is awake

A-Sleep disorders
B-Nightmares
C-Narcolepsy
D-Night terrors

C-Narcolepsy

C- Narcolepsy

The correct answer is C - Narcolepsy.

To arrive at this answer, we need to understand the definition and symptoms of each option:

A - Sleep disorders: This is a general term that encompasses various conditions such as insomnia, sleep apnea, and restless leg syndrome. Uncontrollable sleeping, as described in the question, is not a specific symptom of sleep disorders.

B - Nightmares: Nightmares are vivid and disturbing dreams that occur during rapid eye movement (REM) sleep. While nightmares can disrupt sleep and cause fear or distress upon waking, they do not involve uncontrollable sleeping while awake.

C - Narcolepsy: Narcolepsy is a chronic sleep disorder characterized by excessive daytime sleepiness and sudden, uncontrollable episodes of falling asleep during the day. These episodes, known as "sleep attacks," can last for a few seconds to several minutes and can occur even when the person is engaged in activities such as talking, eating, or working.

D - Night terrors: Night terrors are episodes of intense fear and partial awakening from sleep, commonly occurring in children. They usually involve screaming, sweating, and a sense of danger. Night terrors differ from uncontrollable sleeping while awake as they happen during sleep, specifically during non-rapid eye movement (NREM) sleep.

By comparing the symptoms and characteristics of each option, we can deduce that the correct answer is C - Narcolepsy, as it involves uncontrollable sleeping that occurs for short periods while a person is awake.