The correct answer is B. Clearly defined and managed business rules help separate policy logic from process flow. This separation makes it easier to update policies, decisions, eligibility conditions, constraints, or calculations without unnecessarily redesigning the entire process. Business rules express operational knowledge and guide or constrain behavior. When they are clearly documented and managed, organizations can adapt to regulatory, strategic, or operational changes more efficiently. Option A reverses the stronger principle; process changes may still require policy review. Option C is incorrect because business rules must still be validated for accuracy and consistency. Option D is incorrect because rules are not merely informal guidelines; many business rules are mandatory constraints that must be followed.