The ______________ of a relationship is 0 if there is no explicit need for the relationship to occur or the relationship is optional ?
Correct answer: A. modality
- A. modality
- B. cardinality
- C. entity
- D. structured analysis
Explanation
Modality indicates whether participation in a relationship is mandatory or optional; a modality of zero means the relationship need not occur. Cardinality instead specifies how many instances may participate.
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