Which of the Following Statements Regarding Pain and Anxiety Are

Which of the following statements regarding pain and anxiety are true?

A) Anxiety is a state marked by apprehension, agitation, autonomic arousal, and/or fearful withdrawal.
B) Critically ill patients often experience anxiety, but they rarely experience pain.
C) Pain and anxiety are often interrelated and may be difficult to differentiate because their physiological and behavioral manifestations are similar.
D) Pain is defined by each patient; it is whatever the person experiencing the pain says it is.
E) While anxiety is unpleasant, it does not contribute to mortality or morbidity of the critically ill patient.