Correct Answer: B

Rationale: Sundowning is a phenomenon commonly seen in elderly individuals, particularly those with cognitive impairments like dementia, where they become more restless, anxious, confused, or agitated during late afternoon and evening hours, typically around sunset. This change in behavior can manifest as increased confusion, wandering, aggression, or vocalization. The exact cause of sundowning is not completely understood but may involve a combination of factors such as disruptions in the sleep-wake cycle, fatigue, decreased lighting, and hormonal imbalances. Managing sundowning behaviors may involve environmental modifications, maintaining a regular routine, ensuring proper lighting, and addressing any underlying medical conditions contributing to the behavior changes.

Correct Answer: C

Rationale: Nitroglycerin sublingual tablets are meant to be dissolved under the tongue to allow for rapid absorption into the bloodstream. Placing the tablet under the tongue helps to bypass the first-pass metabolism in the liver, leading to a quicker onset of action and chest pain relief. Chewing, swallowing, or applying the tablet to the skin will result in decreased effectiveness or delayed onset of action. Therefore, it is important for the patient to be instructed to place the nitroglycerin tablet under the tongue and allow it to dissolve for optimal therapeutic benefit.

Correct Answer: D

Rationale: Transcription errors are typically associated with issues such as illegible handwriting, misinterpretation of directions, and the use of unapproved abbreviations. However, the wrong route of medication administration is not specifically related to transcription errors but rather falls under the category of medication administration errors. Administering medication via the wrong route can lead to serious consequences for the patient and is a separate issue from the act of transcribing doctor's orders.

Correct Answer: D

Rationale: In a longitudinal study design, the nurse researcher collects data at multiple points over an extended period of time. This design allows for the examination of changes or trends over time within the same group of participants. It helps in understanding the long-term effects and relationships between variables by tracking the same individuals over a prolonged duration. This design is particularly useful in studying developmental patterns, chronic diseases, or long-term treatment outcomes.

Correct Answer: C

Rationale: Cryptosporidium parvum is a protozoan parasite often found in contaminated water sources. This parasite is known to cause watery diarrhea, abdominal cramps, and nausea in infected individuals. The presence of oocysts in the stool sample is characteristic of Cryptosporidium infection. Other parasitic infections may present with similar symptoms, but in this case, the most likely culprit based on the exposure history and laboratory findings is Cryptosporidium parvum.