Regarding cognitive therapies, which of the following statements is FALSE?

Regarding cognitive therapies, which of the following statements is FALSE?
 
  a. Cognitive therapy techniques are based on the view that distorted ways of thinking underlie emotional problems.
  b. Cognitive therapies are relatively brief forms of treatment.
  c. Cognitive therapies focus more on what is happening in the present than on what happened in the past. d. Clients are given homework assignments in cognitive therapy.
  e. Cognitive therapists believe that emotional problems are caused by negative events and life experiences.