Why Have Social Security Numbers Traditionally Been Used as Primary

question 11

Multiple Choice

Why have Social Security numbers traditionally been used as primary keys for database tables that store personal data on individual people?

• A) All other columns in such a table are functionally dependent on the Social Security number column.
• B) The Social Security number is always the only candidate key in such a table.
• C) A Social Security number column is functionally dependent on all the other columns in such a table.
• D) The Social Security number is functionally independent of most other columns in such a table.

---

Definitions:

Rumor

Information or a story that is circulated from person to person but has not been proven to be true.

Aerospace Industry

The sector engaged in the research, design, manufacture, operation, and maintenance of aircraft and spacecraft.

Ph.D.

A Doctor of Philosophy degree, a type of doctoral degree awarded by universities, representing high-level achievement in research and academic study.

Patents

A legal authorization granted to an inventor or assignee, providing exclusive rights to produce, use, or sell an invention for a certain period of time.