Adding and removing multiple-choice distractors 
You can include from one to eight distractors (choices) in a Multiple Choice learning interaction. You can change the default number of six distractors by adding additional distractors or deleting existing distrators.
  - Select the frame with the Multiple Choice learning interaction in the Timeline.
 
  - Open the Flash UI Components folder in the Library panel (Window > Library) and drag a CheckBox component to the Stage.
 
  - In the Property inspector, name the instance. See Naming and registering graphic distractors.
 
  - Add the instance name to the Component Inspector panel for the multiple-choice distractor.
    
The component does the rest of the work for you at runtime.
   
 
  - Select the CheckBox instance that you want to remove, and delete it from the Stage.
 
  - Select the Multiple Choice component (to the left of the Stage in the quiz template), then display the Component Inspector panel (Window > Development Panels > Component Inspector).
 
  - Remove the deleted object's instance name from the list in the Component Inspector panel.