The correct answer is A. Entitlement data must be available before the reasoning engine decides which subagents or actions are eligible. Setting custom variables in before reasoning ensures the membership tier is hydrated early enough to drive deterministic filters, available when rules, and flow inputs. Option B is wrong because after reasoning occurs too late for initial action visibility and routing decisions in the current reasoning cycle. Option C is wrong because the Agent Router is for routing/classification logic, not the best place to establish reusable entitlement state for action filters and downstream flow logic. The key Agentforce design principle is to make access conditions deterministic before the LLM sees tools. That prevents the agent from offering bronze, silver, or gold actions outside the customer’s actual entitlement level.