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

question 20

Multiple Choice

For the following entity-relationship diagram, what could the primary key be in the Grade entity?

• A)Primary key from Student entity
• B)Primary key from Course entity
• C)The student's grade in the course.
• D)Primary key made up of the primary keys from Student entity and Course entity

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Definitions:

Longissimus Thoracis

A major muscle in the back part of the spinal erector group that helps in extending and laterally flexing the spine.

Spinalis Cervicis

A muscle in the back part of the neck that helps in extending the cervical vertebrae.

Intercostal Muscles

Muscles located between the ribs that play a key role in the mechanical aspect of breathing by assisting in the expansion and contraction of the chest cavity.

Change the Size

A process or action that results in an alteration of the dimensions, proportions, or magnitude of an object or entity.