Following the addition of social anxiety disorder to the DSM (Diagnostic and Statistical Manual of Mental Disorders), mental health professionals observed a significant increase in its diagnosis rates. What is the most likely explanation for this pattern?

The addition to the DSM made clinicians more likely to recognize and diagnose the disorder.

Social anxiety disorder became contagious after being added to the DSM.

The DSM eliminated all other anxiety disorders, forcing clinicians to use this diagnosis.

The population suddenly experienced a dramatic increase in anxiety symptoms.