Question: The column added to a relation to store a unary one - to - many relationship _ _ _ _ _ . Question 2 options:

The column added to a relation to store a unary one-to-many relationship _____.
Question 2 options:
must have the same column name as the primary key
must have the same domain of values as the primary key
must have the same value in each row as the primary key value of that row
All of the above

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