Answer:
The correct answer is D. The incentive students have to study harder.
The entity integrity rule states that a primary key attribute can be null. Thus the statement is false.
<h3>What is an entity?</h3>
An entity is refer to any object that exists in reality. These entities are Independent in nature. Each row in a table should be a distinct entity, which is ensured by entity integrity.
The entity integrity rule states that a primary key attribute can not be null as it shows unique characteristics of an entity.No primary key value can be null according to the entity integrity constraint because it is needed to identify specific attribute values in relation.
Therefore, the statement is False.
learn more about entity integrity, here:
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It is probably because Moroccan, Algerian, Tunisian, and Libyan, people back in the day migrated to Italy for better opportunities. And so they most likely spread the language and culture throughout Italy.