Which of the following symptom(s) is(are) common to each of the anxiety disorders

described in the text?

a. Fear reactions that occur without warning and therefore cannot be anticipated.
b. Flashbacks or nightmares about the feared object.
c. Avoidant behaviors and excessive worries.
d. Marked and persistent fear that interferes with normal routine and/or daily
functioning.
e. All of the above symptoms are common to each of the anxiety disorders
described in the chapter.

D