Comprehensive and Detailed Explanation From Exact Extract:
In Revenue Cloud CLM:
* Document Clause is the primary object that stores clause metadata (including clause text, type, record type, and relationships to clause sets and templates).
* Reports focused on clause-level analysis are built on the Document Clause object.
Document Template (B) stores template definitions, not individual clause instances.
Document Authored Content (C) holds authored/merged content but is not the main metadata repository for clause library analysis.
References:
CLM / DocGen & Clause Management Documentation - Document Clause object Revenue Lifecycle Management Guide - Reporting on Clauses and Contracts