To work with Document AI, the database role must be granted to the account role. This role specifically enables creating Document AI model builds and working on document processing pipelines. Option A grants a more general Cortex user role, which is not the specific foundational role for Document AI. Option B grants access to all Cortex models, but not the foundational Document AI database role itself. Options D and E grant schema-level or warehouse-level privileges, which are also necessary but are not the database-level 'role' specifically for DocumentAI capabilities.