You have just finished entering field names for your database. You need to choose the primary key or key field but none of your fields are unique. What should you do?

A. Save the database without a key field

B. Use one of the existing fields even if it is not unique

C. Let the database assign a unique number in a new field

D. Use a spreadsheet instead

C. Let the database assign a unique number in a new field

Option C is the correct answer to the following question.

Explanation:

In the following option is true because when once the entering of the fields name is done and you didn't choose any of the fields as primary but you want to choose field as primary and you also not choose any field as unique then, you should do one thing, you have to assign a unique number in your database in a new field.