What Is the Best Nursing Response to the Mother of a 4-Year-Old

What is the best nursing response to the mother of a 4-year-old child who asks what she can do to help the child cope with a sibling's repeated hospitalizations?

A) Recommend that the child be sent to visit the grandmother until the sibling returns home.
B) Inform the parent that the child is too young to visit the hospital.
C) Assume the child understands that the sibling will soon be discharged because the child asks no questions.
D) Help the mother give the child a simple explanation of the treatment, and encourage the mother to have the child visit the hospitalized sibling.