The Primary Key of the Relation Added to Accomplish the Many-To-Many

Multiple Choice

The primary key of the relation added to accomplish the many-to-many relationship ____.

A) must contain at least three attributes
B) must contain at least four attributes
C) is the primary key of one of the two relations involved in the many-to-many relationship
D) does not involve the primary keys of either of the two relations involved in the many-to-many relationship
E) is the combination of the primary keys of the two relations involved in the many-to-many relationship plus possible additional attributes