An engineer configures AWS DMS CDC from a supported PostgreSQL source. Network access is available, but the task cannot obtain the required logical change stream. Which source-side preparations should the engineer verify? Select 2 answers.

1. Enable the logical replication configuration required for the source deployment and ensure suitable log retention or replication-slot handling.
2. Grant the DMS source account the documented permissions needed to access the selected tables and replication information.
3. Disable source write-ahead logging so DMS does not need to read transaction changes.
4. Grant only S3 bucket read access to the PostgreSQL database user.
5. Use a full-load-only task and assume it delivers every later transaction.