Doctors Can Easily Examine Lymph Nodes to See If a Patient

Doctors can easily examine lymph nodes to see if a patient is fighting disease because

A) many lymph nodes are near the surface of the body.
B) all lymph nodes are near the surface of the body.
C) lymph nodes become hot when fighting disease.
D) lymph nodes secrete pus when fighting an infection.
E) lymph nodes are concentrated in the abdomen.