A: True. The WITH GRANT OPTION allows the grantee to grant the object privileges they received to another user or role. This can be used for both system and object privileges, thereby extending the privilege chain.
D: True. When an object privilege granted with the WITH GRANT OPTION is revoked, it also revokes the privileges that the grantee had re-granted to others. This is referred to as a cascading effect, which can impact multiple users and roles depending on the extent of re-granting.
F: True. To add a foreign key constraint that references a table in another schema, the user must have the REFERENCES object privilege on the target table in the other schema. This privilege is specific and necessary for the integrity constraints involving foreign keys.