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There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called

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There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called (a) Commonality (b) Specialization (c) Generalization (d) Similarity This question was posed to me in an international level competition. I'd like to ask this question from Extended E-R Features in chapter Database Systems Design and Implementation of Database Management

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The correct answer is (c) Generalization For explanation: Generalization is used to emphasize the similarities among lower-level entity sets and to hide the differences.

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