Correct Answer: B

Rationale: The developmental care approach emphasizes creating an environment that supports the infant's developmental needs, including family-centered care, a healing environment, and promoting protected sleep. Payment scale considerations are not a component of developmental care.

Correct Answer: A

Rationale: Carrots and green, leafy vegetables are high in potassium, which should be avoided in hyperkalemia. Therefore, this choice requires further instruction by the nurse to prevent exacerbating the child's condition.

Correct Answer: C

Rationale: The correct answer is C: 'Dry, hacking cough.' A dry, hacking cough is a classic manifestation of pertussis. Pertussis typically presents with symptoms of an upper respiratory tract infection, starting with a persistent, severe, and uncontrollable cough that can worsen at night. This cough is often followed by a high-pitched 'whoop' sound as the patient tries to catch their breath, hence the term 'whooping cough.' In contrast, options A, B, and D are not typically associated with pertussis. Inflamed throat with exudate may suggest a bacterial throat infection like streptococcal pharyngitis, purulent eye drainage is more indicative of a bacterial conjunctivitis, and Koplik spots on the buccal mucosa are specific to measles. Therefore, recognizing the dry, hacking cough as a manifestation of pertussis is crucial for early identification and appropriate management of the disease.

Correct Answer: D

Rationale: A specific gravity of 1.009 is low, indicating diluted urine, which can be concerning in the context of a urinary tract infection. Diluted urine may suggest inadequate concentration due to increased fluid intake or impaired kidney function, which are important considerations in the assessment of a possible UTI.

Correct Answer: C

Rationale: Improving the child's competence and creating a positive environment is the most effective strategy to promote positive behavior in children. This approach focuses on enhancing the child's skills and abilities while fostering a supportive and encouraging atmosphere. By empowering the child and surrounding them with positivity, they are more likely to exhibit positive behaviors as they feel competent, valued, and motivated. This strategy emphasizes support and reinforcement over punitive measures, leading to long-lasting behavioral improvements.