Gloria sometimes finds herself experiencing episodes of sudden overpowering terror and worry that come out of nowhere and make her short of breath. based on this, gloria might be diagnosed with
a. panic disorder.
b. agoraphobia.
c. posttraumatic stress disorder.
d. generalized anxiety disorder.

a. panic disorder.              

Explanation:

Panic disorder: The term panic disorder is a kind of anxiety disorder. Panic disorder often described as leading panic attacks, i.e, the sudden feelings or emotions of terror in the absence of any real or existing danger. An individual experiencing panic attacks often feel losing control and physical symptoms like fasten heartbeat, shortness of breath, etc.

Generally, anyone can experience a panic attack but when someone gets more than one panic attack or more often then it can be diagnosed as a panic disorder.