A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be - Study24x7
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A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

A

the pin code

B

the last name

C

a compound key consisting of the first name and the last name

D

All of the above

Computer Science
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