The Caregiver of an Adolescent Remarks to the Nurse That

The caregiver of an adolescent remarks to the nurse that her child seems to have fatigue and not get enough oxygen. The physical examination and other tests are normal. Which of the following explanations by the nurse will be most helpful?

A) "The tests may have missed a cardiac or respiratory problem and the health care practitioner will probably want to repeat them later."
B) "As the heart becomes larger in adolescence, the pumping mechanism is somewhat inefficient for a while and the lungs have not yet fully matured."
C) "Adolescents fake tiredness to get out of doing chores or associating with people they consider to be boring."
D) "I suggest you take him to one of the better and larger clinics there they have more sophisticated equipment."