Nearly constant anxiety not associated with a specific thinga) agoraphobiab) post traumatic stress disorderc) generalized anxiety disorderd) panic disorder

c) Generalized anxiety disorder

Explanation:

According to the APA (American Psychology Association), generalized anxiety disorder (GAD) is a type of anxiety disorder that is characterized by excessive, exaggerated anxiety and worry about everyday life events with no obvious reasons. In people with GAD, the worry is often unrealistic or out of proportion.

As with any other anxiety disorder, eventually, the anxiety dominates the person's thinking and it interferes with daily functioning.

Thus, the correct answer is c)

Note:

The other options are all anxiety disorders but:

a) Agoraphobia occurs when you fear and thus avoid places or situations that might cause you to panic and make you feel trapped, helpless or embarrassed.

b) Post Traumatic Stress disorder occurs when the person experienced a traumatic event and the anxiety is usually triggered by things associated to that event.

d) Panic disorder: is characterized by unexpected and repeated episodes of intense fear accompanied by physical symptoms