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

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ER Model and Business Rules
Inheritance is which of the following?

When a subtype entity inherits values of the supertype attribute
When a supertype entity inherits values of another supertype attribute
When a supertype entity inherits values of the subtype attribute
When a subtype entity inherits values of another subtype attribute

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