The body's first line of defense against pathogens includes a) antibodies b) memory cells c) t cells d) wax in the ears

Doctor a.d. aitchdey conducts research on childhood disorders. specifically, she wants to learn more about disorders in which the children's behaviors cause disruptions in their environments. her next project will focus on children with conduct disorder. in other words, doctor aitchdey's research is focusing on the category of childhood disorders.