Answer:
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.