Pedro is afraid of crossing bridges. A psychologist helps Pedro by first letting him look at bridges ...

Pedro is afraid of crossing bridges. A psychologist helps Pedro by first letting him look at bridges and then having him imagine himself standing near a bridge while being in a safe, relaxing environment. Next, the psychologist has Pedro watch a video of a man crossing a bridge in a car and then has him imagine himself crossing that bridge. Eventually, Pedro is able to stay relaxed while he drives over a bridge. This process is called ____.
 
  a. systematic desensitization therapy
  b. imagining assertiveness
  c. modeling
  d. image therapy