[Options A and B]
When full_page_writes is ON, the entire content of each data page is written to the WAL during the first modification to that page after a checkpoint. When OFF, only the changes are written to the WAL, potentially improving response performance and reducing WAL write volume.

[Option C]
Even when the wal_level parameter is set to minimal, the behavior is the same as described above.

[Option D]
When full_page_writes is OFF, a system crash during a partial page write can lead to unrecoverable data corruption.

[Option E]
Even with full_page_writes set to OFF, you can still obtain base backups and WAL segments that can be used for point-in-time recovery.
However, since full_page_writes=on is temporarily in effect from the execution of pg_start_backup until pg_stop_backup is executed, care must be taken to avoid degradation in response performance when updating data.

Therefore, inaccurate statements are C and E.

Refer to the official documentation for details.
https://www.postgresql.org/docs/10/runtime-config-wal.html#GUC-FULL-PAGE-WRITES