Darlene is constantly nervous, tense, and apprehensive. she worries about her health, her job, her children, and her relatives. her husband has tried to reassure her that everything is going well, but she can't seem to shake her pervasive anxiety. darlene is probably experiencing:
(a) generalized anxiety disorder.
(b) panic disorder.
(c) obsessive-compulsive disorder.
(d) antisocial personality disorder.

Darlene is probably experiencing from (A) generalized anxiety disorder.

Explanation:

Generalized anxiety disorder is a type of anxiety disorder. The common characteristics of this disorder include uncontrollable, excessive, chronic worry about various common events and activities. A person suffering from this disorder constantly worries about common matters such as job, health, family, money and interpersonal relationship problems.

The common symptoms are fatigue, restlessness, irritability, sweating and trouble in sleep.

Therefore, Darlene is probably experiencing from generalized anxiety disorder.