Correct Answer: D

Rationale: The most crucial information for the nurse to obtain in this scenario is how often the metered-dose inhaler (MDI) is used daily. This information will help assess if the symptoms of insomnia, shakiness, and palpitations are potentially related to overuse of the inhaler, which can cause side effects such as tremors and palpitations. Monitoring the frequency of MDI usage is essential in managing asthma and ensuring appropriate medication administration.

Correct Answer: C

Rationale: Monitoring for signs of an allergic reaction, such as facial swelling or urticaria, is crucial when administering antibiotics like azithromycin. It is important to watch for these signs to promptly identify and manage any potential adverse reactions during the course of treatment.

Correct Answer: A

Rationale: Engaging in odd repetitive behaviors is a hallmark sign of autism spectrum disorder in children. These behaviors can include repetitive movements, insistence on sameness, or specific routines. Recognizing and addressing these behaviors early can help in providing appropriate interventions and support for the child.

Correct Answer: C

Rationale: Using a barrier cream like zinc oxide protects the skin and helps prevent diaper rash.

Correct Answer: D

Rationale: The most important information for the nurse to obtain is how often the MDI is used daily. This is crucial to assess if the symptoms of insomnia, shakiness, and rapid heart rate are related to overuse of the inhaler, leading to potential side effects such as systemic effects of beta-2 agonists.