Which of the Following Approaches Is a Good Way to Proceed

Which of the following approaches is a good way to proceed with the influence diagram building for a problem?

A) The influence diagram for the entire problem is build first and then separate portions are clustered to form separate models.
B) The influence diagram for all the model parts at the same level are built in parallel to reduce the likelihood of error.
C) The influence diagram is reverse engineered -the diagram is developed in the opposite direction starting with the model output.
D) The influence diagram for a portion of the problem is build first and then expanded until the total problem is conceptually modeleD)