For the relationship between Employee and Project, we cannot directly add foreign key to create such a relationship in relational database management systems (DBMS). This is because relational DBMS cannot handle multiple values in an attribute. O relational DBMS require all relationships to be one-to-one type. O relational DBMS do not allow primary keys to have null value. O relational DBMS cannot handle duplicated values for attributes.

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A:

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A: solution

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