A patient visits her doctor for a routine checkup.The doctor observes lymphadenopathy,or swollen lymph nodes in the side of the patient's neck.The patient says,"Those have been swollen for a few months,but I have felt fine that whole time." Indeed there are no other symptoms.What is a likely cause of this problem?
A) The patient is developing a bacterial infection. B) The patient needs a tonsillectomy. C) The patient is HIV positive. D) The patient is recovering from the flu.