Fallon is so anxious that the anxiety by itself causes her to suffer. Fallon's situation represents the aspect of the definition of abnormality called:

A) deviance.
B) distress.
C) dysfunction.
D) danger.

Anxiety

A feeling of worry, nervousness, or unease about something with an uncertain outcome, often reflecting a reaction to stress.

Distress

Extreme anxiety, sorrow, or pain, which can be a response to an immediate threat or long-term stressor, affecting one's mental and emotional well-being.