Which Is True of an Autonumber Key

question 29

Multiple Choice

Which is true of an autonumber key?

• A)It can be used,with consecutive integer values,when no other primary key is available.
• B)If a "natural" primary key,such as product code,is available,it is a better option than an autonumber primary key; it will lead to more accurate query results.
• C)It is best used as a primary key in conjunction with another primary key,such as a Social Security number.
• D)It has often been used in Access database tables,but it shouldn't be used in an Excel Data Model.

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Definitions:

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The phenomenon where there is an increase in the frequency and intensity of REM (Rapid Eye Movement) sleep after periods of REM sleep deprivation.