7. For the relationship represented in the figure below, which of the following is true? A) An employee can work in more than one department but does not have to work for any department. B) A department must have at least one employee. C) A department can have more than one employee. D) An employee has to work for more than one department. 8. The process of defining a more general entity type from a set of more specialized entity types is called: A) generalization. B) specialization. C) nomalization. D) extrapolation. 9. The rule specifies that an entity instance of a supertype is allowed not to belong to any subtype. A) semi-specialization B) total specialization C) partial specialization D) disjointness 10. The following figure shows an example of: A) the disjoint rule. B) the completeness rule. C) the underdog rule. D) the overlap rule