The Nurse Is Assessing a 3-Year-Old Boy's Development During a Well-Child

The nurse is assessing a 3-year-old boy's development during a well-child visit. Which response by the child indicates the need for further assessment?

A) He says a swear word when he hurts himself playing.
B) He says "pew" when his sister has soiled her diaper.
C) He laughs when his brother cries getting vaccinated.
D) He constantly asks "why?" whenever he is told a fact.