Roger is a single father of two young daughters and has been dating Cheryl for the past two years. He recently learned that his company is going to downsize. Although Roger is financially stable, he is worried that his job is in jeopardy. He hasn't told anyone of the situation. Cheryl and his daughters have noticed that Roger is irritable and doesn't seem to be interested in doing anything. He is experiencing headaches, restlessness, and insomnia. Roger decides to seek professional help and starts seeing a cognitive therapist.

Roger's symptoms are signs of

a. panic disorder.

b. depression.

c. personality disorder.

d. ineffective use of defense mechanisms.