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When representing a 1:1 relationship in a relational database design, OA the key of both tables must be the same B. the table, that

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When representing a 1:1 relationship in a relational database design, OA the key of both tables must be the same B. the table, that represents the relationship, gets the key from both relations OC. the key of each table must be placed as foreign keys into the other D. the key of either table may be placed as a foreign key into the other

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