An 8-year-old child enters a health care facility. During assessment, the nurse discovers that the child is experiencing the anxiety of separation from his parents. The nurse makes the nursing diagnosis of Fear related to separation from familiar environment and family. Which nursing intervention is most likely to help the child cope with fear and separation（）
A. Ask the parents not to visit the child until he has adjusted to the new environment.
B. Ask the physician to explain to the child why he needs to stay in the health care facility.
C. Explain to the child that he must act like an adult while he’s in the facility.
D. Have the parents stay with the child and participate in his care.