What Is a Foreign Key

question 9

Multiple Choice

What is a foreign key?

• A) A field (or group of fields) that uniquely identifies a given entity in a table.
• B) A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.
• C) Characteristics or properties of an entity.
• D) A field (or group of fields) that uniquely identifies a given attribute in a table.

---

Definitions:

Drugstore

is a retail shop where medications, as well as other household items and cosmetics, are sold.

Average Total Cost Curve

The graphical representation showing the relationship between the total cost per unit of output produced and the quantity of output.

Monopolistic Competition

An economic framework where numerous companies offer products that are alike but not exactly the same, granting them a certain level of control over the market.

Long Run

In economics, this refers to a period in which all factors of production and costs are variable, allowing full adjustment to changes.