A parent asks, 'Can I get head lice too?' The nurse indicates that adults can also be infested with head lice but that pediculosis is more common among school children, primarily for which of the following reasons?

D The skin of adults is more capable of resisting the invasion of lice. B School-age children tend to be more neglectful of frequent handwashing. A An immunity to pediculosis usually is established by adulthood. C Pediculosis usually is spread by close contact with infested children.