A Father Calls Because His Son Has Head Lice

A father calls because his son has head lice.He reports that he used Kwell shampoo three times,but nothing happened." He wants to know what to do now.What will the nurse advise first?

A) "It sounds like you need a prescription for a second product,malathion."
B) "Try one of the lotion products instead."
C) "Be sure to use a nit comb to remove nits from the hair shafts."
D) "Try combing through the hair with mineral oil to loosen the lice from the hair shafts."