The correct answer is C.
OBJ-5.3: Policies are formalized statements that apply to a specific area or task. Policies are mandatory, and employees who violate a policy may be disciplined. Guidelines are general, non-mandatory recommendations. Best practices are considered procedures that are accepted as being correct or most effective but are not mandatory to be followed. Configuration settings from the prior system could be helpful, but this is not a mandatory compliance area like a policy. Therefore, Jay should first follow the policy before the other three options if there is a conflict.