USER_DATA is a nonencrypted tablespace that contains a set of tables with data. You want to convert all existing data in the USER_DATA tablespace and the new data into the encrypted format. Which methodswould you use to achieve this?（）

• A、Use Data Pump to transfer the existing data to a new encrypted tablespace
• B、Use ALTER TABLE MOVE to transfer the existing data to a new encrypted tablespace
• C、Use CREATE TABLE AS SELECT to transfer the existing data to a new encrypted tablespace
• D、Enable row movement for each table to be encrypted and then use ALTER TABLESPACE to encrypt the tablespace
• E、Encrypt the USER_DATA tablespace using the ALTER TABLESPACE statement so that all the data in the tablespace is automatically encrypted