A combination of object and system privileges can indeed be granted to a role, which allows for greater flexibility in managing permissions. Schema owners have the ability to grant object privileges on objects within their schema to other users or roles. Only users with the GRANT ANY PRIVILEGE privilege can grant and revoke system privileges from other users, emphasizing their unique authority in managing system-level permissions. Not all types of schema objects have associated object privileges, which excludes option B. The creation of roles is not exclusive to users with the DBA role, making option D incorrect. Additionally, object privileges granted on a table do not automatically apply to its synonyms, thus option F is also not correct.