An RN at an Elementary School Notices a Second Grade

An RN at an elementary school notices a second grade female scratching and pulling at her pants. The student complains that her buttocks itch. Upon further assessment, the patient reports that the itching worsened in the morning hours. Since another child in the student's class was recently diagnosed with Enterobius vermicularis, or pinworm infection, the RN. contacts the girl's mother and recommends follow up with her pediatrician.
-The RN explains to the patient's mother that Enterobius vermicularis is a helminth.He explains that disease-causing helminths are ________.

A) usually only visualized by microscope
B) unicellular organisms
C) primarily found in the gastrointestinal tract
D) functionally similar to viruses