Answer:
a. Anxiety
Step-by-step explanation:
Anxiety: In abnormal psychology, the term anxiety is defined as the process through which an individual's body naturally responds to a particular stress. It refers to an individual's feelings of apprehension and fear about what so ever is about to come.
Example: An individual going to school for the first day can cause him or her feel nervous or fearful.
Anxiety related disorders:
1. Panic Disorder.
2. Post-Traumatic Stress Disorder (PTSD).
3. Generalized Anxiety Disorder.
4. Social Phobia.
5. Obsessive-Compulsive Disorder (OCD).
In the question above, the client's reaction would be related to anxiety.