单项选择题

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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