Question: The incomplete coverage constraint for a generalization relationship means that: Group of answer choices a superclass instance can be a member of one or more

The incomplete coverage constraint for a generalization relationship means that:
Group of answer choices
a superclass instance can be a member of one or more of the subclasses. [overlapping]
some subclass instance is not a member of any superclass. [not possible]
a superclass instance can be a member of at most one of the subclasses. [disjoint]
each superclass instance is a member of some subclass. [complete]
some superclass instance is not a member of any subclass.

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