The correct answer is C because reverse affiliation creation is handled by the AffiliationReciprocalHandler . Salesforce Help for Life Sciences trigger handlers identifies AffiliationReciprocalHandler as the handler that manages reciprocal affiliations. The same documentation notes behavior related to reciprocal affiliations and affiliation type handling, which directly matches the scenario where a newly created affiliation should automatically create the reverse relationship.

Affiliation Reverse Role Mapping defines how the relationship role should translate between the original and reciprocal records. For example, if an HCP is “Attending” at an HCO, the reverse relationship may show the HCO as “Employing” or otherwise related to the HCP, depending on the configured mapping. However, defining the mapping alone does not execute the automation. The trigger handler must be active so that when users create a new Affiliation record, Salesforce can generate the reciprocal Affiliation record using the configured reverse role mapping.

Option A, AffiliationUniquenessHandler , is incorrect because uniqueness logic prevents duplicate or invalid affiliation records; it does not create the reverse relationship. Option B, HardAffiliationHandler , is also incorrect because it is not the handler identified for reciprocal affiliation generation. Since the missing behavior is automatic creation of the reverse affiliation, the consultant must enable AffiliationReciprocalHandler .