Correct Answer: B

Rationale: The correct intervention to maintain the skin integrity of a preterm infant born at 30 weeks is to bathe the infant with sterile water. Bathing with sterile water or a neutral pH solution is recommended to protect the delicate skin of preterm infants, which is more permeable and prone to damage. Choices A, C, and D are incorrect as avoiding cleaning the skin may lead to hygiene issues, cleansing with alkaline-based soap can be harsh on the delicate skin, and thoroughly rinsing with plain water after bathing may not be as gentle and protective for preterm infants.

Correct Answer: D

Rationale: Accidents, such as motor vehicle accidents, drowning, and falls, are the primary cause of death in children over 1 year of age. While congenital anomalies can be a significant cause of mortality in infants, they are less common in older children. Homicide and suicide are serious issues but are not as prevalent as accidents in causing death among children over 1 year of age.

Correct Answer: D

Rationale: Bowleggedness is normal in toddlers due to the development of lower back and leg muscles. It usually resolves as the child grows.

Correct Answer: C

Rationale: A murmur is produced by turbulent blood flow within the heart or major arteries, resulting in audible vibrations.

Correct Answer: C

Rationale: A BMI-for-age at the 85th percentile indicates a child is at risk for being overweight, according to the National Center for Health Statistics criteria.