A mother complains to the nurse at the pediatric clinic that her 4-year-old child always talks to her toys and makes up stories. The mother wants her child to have a psychological evaluation. The nurse's best initial response is to

A) refer the child to a psychologist immediately.
B) explain that playing make believe is normal at this age.
C) complete a developmental screening using a validated tool.
D) separate the child from the mother to get more information.