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For the data table below, identify a column or group of columns that make up a candidate primary key: first_name last_name street_address city state postal_code
For the data table below, identify a column or group of columns that make up a candidate primary key:
first_name | last_name | street_address | city | state | postal_code |
John | Smith | 79873 Hudson Alley | Washington | District of Columbia | 20566 |
Mary | Smith | 79873 Hudson Alley | Washington | District of Columbia | 20566 |
Darcy | D'Alessandro | 6777 Hanson Center | Lancaster | Pennsylvania | 17622 |
John | Smith | 147 Memorial Junction | Indianapolis | Indiana | 46216 |
A.first_name + last_name
B.first_name + last_name + street_address
C.last_name + postal_code
D.street_address
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