Which statement about the enabling of table compression in Oracle Database 11g is true?（）
- A Compression can be enabled at the table, tablespace, or partition level for direct loads only.
- B Compression can be enabled only at the table level for both direct loads and conventional DML.
- C Compression can be enabled at the table, tablespace, or partition level for conventional DML only.
- D Compression can be enabled at the table, tablespace, or partition level for both direct loads and conventional DML.