What are the advantages of the iterative route step? There are 2 correct answers to this question.

What are the advantages of the iterative route step? There are 2 correct answers to this question.
A . Entry and exit user roles can be defined.
B . Participants can send a form back and forth many times in the same route map.
C . It is always available in the inbox of all participants for viewing and editing
D . It can be used as the calibration step.

Answer: A,B