Explanation:

In Education Data Architecture (EDA), Affiliation Mappings are used to configure how fields from the Affiliation object are surfaced on the Contact record, including defining Primary Affiliation fields.

This setup controls which affiliation is considered primary and which fields roll up or appear on the Contact for easier access.

It’s the declarative way to manage the link between Contact and Affiliation data in EDA.

Why not the others?
A. Affiliation TDTM records — These manage trigger logic for affiliations, not field configuration.
B. Field Sets for Affiliations — Field sets control UI layout but don’t determine primary affiliation logic.
D. Affiliation Sharing Rules — Manage sharing and access, not field mapping or primary affiliation configuration.