You want to implement a master-detail relation between data blocks based on object tables. How would you do this? （）

• A、Create the relation manually and coordinate the blocks using triggers. 
• B、Base the relation on a REF pointer using the Data Block Wizard. 
• C、Base the relation on a foreign key using the Data Block Wizard. 
• D、This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.