A client reports excessive daytime sleepiness and sudden muscle weakness triggered by strong emotions. The nurse should suspect which condition?

A. Insomnia involves difficulty falling or staying asleep, but it does not typically cause sudden muscle weakness or sleep during the day. B. Central sleep apnea involves disrupted breathing during sleep due to brain signaling issues, not muscle weakness or emotional triggers. C. Hypersomnia is characterized by excessive daytime sleepiness, but it does not include cataplexy (sudden muscle weakness). D. Narcolepsy with cataplexy is marked by overwhelming daytime sleepiness and sudden loss of muscle tone (cataplexy), often triggered by strong emotions like laughter or anger.