The nurse, caring for an infant whose cleft lip was repaired, should include which interventions in the infant's postoperative plan of care? (Select all that apply.).

The correct answer is choice A: Signs of stress.

Choice A rationale:

Children often express stress through physical complaints such as stomach pains, headaches, and fatigue. The 9-year-old's complaints of stomach pains, along with the description of aggressive and stubborn behavior, are indicative of stress. Stressors can include academic pressures, family issues, social challenges, or other emotional factors.

Choice B rationale:

Developmental delay refers to a situation where a child's developmental milestones are significantly delayed compared to their peers. This doesn't align with the presented symptoms of stomach pains, aggression, and stubbornness. These symptoms are more indicative of emotional or psychological distress.

Choice C rationale:

While a physical problem could potentially cause emotional stress, the scenario doesn't provide enough information to directly conclude that a physical problem is the primary trigger. Stomach pains could indeed result from emotional stress, and it's important to consider the child's overall well-being.

Choice D rationale:

Lack of adjustment to the school environment can lead to behavioral and emotional challenges, but it's not the most direct explanation for the symptoms described in the scenario. The combination of stomach pains and behavioral changes suggests a more immediate emotional trigger, which is often stress-related.

The correct answer is choice C: Concrete operations stage.

Choice A rationale:

The preoperational stage, which occurs roughly between ages 2 and 7, is characterized by egocentrism, animism, and a lack of conservation. Children in this stage struggle with understanding that quantities can remain the same even if their appearance changes. For instance, they might think that pouring water from a tall glass into a short, wide glass somehow changes the amount of water. This stage does not demonstrate the mental understanding required for the examples given in the question.

Choice B rationale:

The intuitive thought stage, which typically spans from ages 4 to 7, is marked by increased symbolic thinking but still lacks the capacity for logical and systematic reasoning. Children in this stage might be able to count and perform basic arithmetic, but they struggle with more complex operations and understanding the underlying principles of mathematical operations. This stage is not where the ability to understand the given math operations is firmly established.

Choice C rationale:

The concrete operations stage, which encompasses ages 7 to 11, is characterized by the development of logical and systematic thinking. Children in this stage are capable of understanding basic mathematical principles and operations, such as conservation of quantity and simple arithmetic. They can mentally manipulate numbers and understand that reversing an operation will yield the original quantity. Therefore, this stage is when the ability to understand that 1 + 3 = 4 and 4 - 3 = 1 occurs.

Choice D rationale:

The formal operations stage, typically beginning around age 11, is characterized by abstract and hypothetical thinking. This is when adolescents and adults can engage in complex reasoning and consider multiple possibilities and outcomes. The given math operations are not the focus of this stage; rather, it pertains to more advanced cognitive abilities like hypothetical problem-solving and deductive reasoning.