The minimum cardinality from the Sales event to the Services entity is most likely 1 because
A)every sale includes performing a service.
B)a service is only recorded once a sale has occurred.
C)only 1 service is provided for each sale.
D)the minimum cardinality is always set to be 1.

Question

Quizplus · Accepted Answer

The statement "every sale includes performing a service" indicates that there is a mandatory relationship between the Sales event and the Services entity, and therefore the minimum cardinality must be 1. This means that every Sale must be associated with at least one Service. Choices B, C, and D are not necessarily true and do not provide a strong enough justification for the minimum cardinality.

The Minimum Cardinality from the Sales Event to the Services