The nurse is planning the preoperative teaching plan for a 12-year-old child who is scheduled for surgery. To help reduce this child's anxiety, which action is best for the nurse to implement?

A. While playing with syringes or hospital masks may familiarize the child with some medical equipment, it may not significantly reduce anxiety about surgery. B. Play therapy with children who have undergone similar surgeries can be beneficial but might not be practical or feasible before surgery. C. Providing a family tour of the preoperative unit allows the child and family to become familiar with the environment, reducing anxiety by demystifying the process and setting. D. Providing dolls and equipment can help in expressing feelings, but it may not directly address anxiety about the surgical procedure itself.