An entity that associates the instances of one or more entity types and contains attributes specific to the relationships is called a(n):
A) associative entity.
B) connecting entity.
C) intersectional entity.
D) all of the above.
Question 2
The entity integrity rule states that:
A) no primary key attribute can be null.
B) referential integrity must be maintained across all entities.
C) each entity must have a primary key.
D) a primary key must have only one attribute.
