What Are the Desired Outputs of Model-Testing Designs

What are the desired outputs of model-testing designs?

A) Evidence that for all future participants the relationships in the model will hold true
B) Identification of which ones of a group of variables are associated with a given outcome
C) Elimination of possible terms in the model that are found not to be statistically significant
D) Establishment of a working theoretical model for a process
E) Proof of causation