ER Model and Business Rules
Which of the following statements concerning business rules is true?

It may include restrictions.
It should not be convertible to computer code.
It should be complex.
All of these

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ER Model and Business Rules
A subtype discriminator is which of the following?

An attribute of the subtype whose values determine the subtype
An attribute of the supertype whose values determine the supertype
An attribute of the subtype whose values determine the supertype
An attribute of the supertype whose values determine the subtype

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