By utilizing the expression sets in BRE module. This selection keeps the implementation declarative and within the intended Public Sector operating model.

The Core Concept Explained: Business Rules Engine externalizes decision logic from custom code. Expression Sets orchestrate calculations and can call decision assets so policy thresholds remain maintainable by authorized business users.

Step-by-Step Technical Analysis: Identify the inputs that drive the decision, declare them as Expression Set resources, and use Decision Matrices or Decision Tables where business users must maintain rule thresholds. Execute representative samples before activation, then confirm the output and Decision Explainer history match the expected eligibility, fee, or prioritization result. Use Expression Sets in Business Rules Engine.

Why the Incorrect Options Are Wrong: B may look related, but it does not place the logic in the correct declarative Public Sector or OmniStudio configuration layer. C can orchestrate work, but it is not the preferred rule-decision asset for maintainable fee, eligibility, or prioritization logic. D may look related, but it does not place the logic in the correct declarative Public Sector or OmniStudio configuration layer.