Which of the Following States the Rule of Entity Integrity

question 22

Multiple Choice

Which of the following states the Rule of Entity Integrity?

• A) Every row must have a value for the primary key and each value must be unique.
• B) Every foreign key must appear as another table's primary key.
• C) Every row must have a value for the primary key and values may be repeated.
• D) None of the above.

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Definitions:

Phylogeny

The examination of the development and connections between different organisms or groups of organisms over time.

Primates

An order of mammals that includes humans, monkeys, and apes, characterized by large brains, forward-facing eyes, and opposable thumbs.

Virulence

A measure of the severity or harmfulness of a pathogen or disease, often in terms of its ability to cause illness or mortality in its host.

Pathogens

Microorganisms such as bacteria, viruses, fungi, and parasites that can cause disease in their host.