You have been asked to create three users， PUB1， PUB2 and PUB3， for three newly hired employees and to allocate unlimited quota on their default tablespace PUBLISHER_TBS with no other privileges. After creating the users， which method can you use for granting the required privileges？（）

• A、grant CONNECT role to all of the three users
• B、grant RESOURCE role to all of the three users
• C、grant both CONNECT and RESOURCE role to all of the three users
• D、execute ALTER USER .. QUOTA UNLIMITED ON publisher_tbs command for all of the three users
• E、create role with UNLIMITED TABLESPACE system privilege and assign the role to all of the three users