Which business rule specifies that each instance of an entity type must have a unique identifier that is not null?
A) Triggering operations
B) Referential integrity
C) Entity integrity
D) Domains
Question 2
Related options should be grouped together, and the same option should have the same wording and codes each time it appears, falls under which category for menu design guidelines?
A) Organization
B) Selection
C) Wording
D) Length