单项选择题

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.

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