Final answer:
Allowing the child to choose from appropriate options when possible is an action the nurse can do that will allow the school age child to feel some perception of control.
Step-by-step explanation:
The action the nurse can do that will allow the school age child to feel some perception of control is B) Allowing the child to choose from appropriate options when possible.
By giving the child choices, the nurse empowers the child and allows them to have a sense of control over their own situation. This can help to reduce anxiety and increase the child's comfort level in the hospital setting. For example, allowing the child to choose what activities they want to engage in during their hospital stay or allowing them to choose their preference for meals can help them feel more in control.