* A Flow with an Assignment element is the best declarative solution to assign cases based on criteria such as Case Origin. It can automatically evaluate the value of the Case Origin and assign the support representative. * Why not other options? * A: Using a trigger is a programmatic approach and less ideal when declarative tools can solve the problem. * B: A formula field cannot assign values; it only calculates and displays results. * C: Validation rules are used to enforce constraints, not for assigning values. References: * Salesforce Flows Overview