In a Hospital Corridor,you Overhear Physicians Discussing a Patient's Soft

In a hospital corridor,you overhear physicians discussing a patient's soft signs.You ask your own physician what they meant and find that they were referring to

A) neurological symptoms,such as delays in fine motor coordination.
B) symptoms that only appear in evidence from low-tech types of testing equipment.
C) indications that suggest a low level of a certain neurotransmitter is present.
D) an area of the brain that experienced a direct blow that causes seizure-like symptoms.