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Select the TWO possible reasons why 1 : 1 relationship might exist. Select one or more: a . It is the freedom of the database
Select the TWO possible reasons why : relationship might exist.
Select one or more:
a
It is the freedom of the database designer.
b
One entity related to only one other entity, and vice versa.
c
Sometimes it means that the entity components were not defined properly
d
It shows the possibility of two entities that actually belong in the same table
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