Humoral antibody response

The nurse and student nurse are discussing the normal white blood cell (WBC) count results of an 80 -year-old patient with pneumonia. Which statements by the student indicate an understanding of why the lab result does not correspond with the diagnosis? Select all that apply. “The laboratory reports are erroneous.” “The patient has decreased T-cell function.” “The patient has decreased humoral antibody response.” “The blood sample might not have been obtained properly.” “The patient has increased bone marrow reserve of granulocyte.”