QUESTION 7 Identify the correct answer among the following statements involving the elements of the Entity-Relationship (ER). Multiplicity constrains the way entities are related and represents the policies or business rules established by the user or enterprise. A primary key is a candidate key that is selected to uniquely identify each occurrence of an entity type and may or may not be irreducible. A weak entity is an entity type that is not existence-dependent on some other entity type. Cardinality determines whether all or only some entity occurrences participate in a relationship