What does the source sequence reconciliation rule do in Identity Resolution?

What does the source sequence reconciliation rule do in Identity Resolution?
A . Source data from disparate systems across the enterprise.
B . Reconcile data by data that’s most frequent across records.
C . Sort data sources in order of most to least preferred for inclusion in Unified Profile.
D . Includes data from sources where the data is alphanumerically sequenced.

Answer: C