For the following entity-relationship diagram, what could the primary key be in the Grade entity?
A) Primary key in Student entity
B) Primary key in Course entity
C) Its own primary key.
D) Primary key made up of the primary keys in Student entity and Course entity
E) It doesn't need a primary key.

Question

For the following entity-relationship diagram, what could the primary key be in the Grade entity? 
A) Primary key in Student entity 
B) Primary key in Course entity 
C) Its own primary key. 
D) Primary key made up of the primary keys in Student entity and Course entity 
E) It doesn't need a primary key.

Quizplus · Accepted Answer

The Answer of For the following entity-relationship diagram, what could the primary key be in the Grade entity? 
A) Primary key in Student entity 
B) Primary key in Course entity 
C) Its own primary key. 
D) Primary key made up of the primary keys in Student entity and Course entity 
E) It doesn't need a primary key.

For the Following Entity-Relationship Diagram, What Could the Primary Key