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MCQOPTIONS

1.	A Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â constraint requires that an entity belong to no more than one lower- level entity set.
A.	disjointness
B.	uniqueness
C.	special
D.	relational
Answer» B. uniqueness

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