 
<prompt> Some children in Tracy's son's class had head lice. Tracy examined every inch of her son's head when she got home. 
 Consider the context given and respond to the question below: Why did Tracy do this? 
A. cut her son's hair B. buy lice shampoo C. make sure her son's head was free of lice <response>: C. make sure her son's head was free of lice 