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he data blocks in your form module are based on object tables. How would you create a master-detail relationship between two of these blocks?（）
A:Use the Data Block Wizard and base the relation on a REF pointer. 
B:In the Object Navigator, select the Relation node under the master block and click the Create icon. Build the relation manually and coordinate the blocks using triggers.
C:Use the Data Block Wizard, and base the relation on the primary key-foreign key relationship in the database. 
D:This task is not possible because master-detail relations can be implemented only for blocks based on relational tables. 

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出自：Oracle认证

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