Correct Answer: D

Rationale: Increased screen time is associated with unhealthy habits, such as poor sleep and snacking, which contribute to obesity, but it does not necessarily improve nutrition knowledge.

Correct Answer: C

Rationale: The most appropriate action is to assist the child back to their room for the treatment but reassure them that they may return when the procedure is completed. This approach ensures that the child receives the necessary treatment while also acknowledging their desire to continue playing in the playroom. Choice A is incorrect because it suggests moving the child to the room and asking the child-life specialist to bring toys, which may not be necessary. Choice B is incorrect as rescheduling the treatment may not be in the best interest of the child's health. Choice D is incorrect as the nurse should guide the child back to their room for the treatment.

Correct Answer: C

Rationale: Significant head lag at 8 months is concerning and warrants further evaluation, as it may indicate developmental delays or neurological issues.

Correct Answer: C

Rationale: A satisfactory radial pulse can typically be taken starting at around 3 years of age, as younger children often have pulses that are too fast and irregular for accurate measurement.

Correct Answer: C

Rationale: PCA pumps are designed to deliver both a continuous baseline dose and patient-activated bolus doses, which can help manage pain effectively while minimizing the risk of overdose.