Which of the following is not a key element of an Entity Relationship model?

Question $9$Select one:

a$.$

Legend

b$.$

Entities

c$.$

Objects

d$.$

Attributes

e$.$

RelationshipsWhich of the following is not a key element of an Entity Relationship model?

Question $9$Select one:

a$.$

Legend

b$.$

Entities

c$.$

Objects

d$.$

Attributes

e$.$

Relationships