Every citizen in the United States has one social security number,but no two citizens have the same social security number.Thus,the cardinality that exists between social security numbers and citizens is
A)one-to-one.
B)one-to-many.
C)many-to-many.
D)many-to-none.

Question

Quizplus · Accepted Answer

As stated in the question, every citizen in the United States has one social security number, and no two citizens have the same social security number. This means that each social security number is uniquely tied to one citizen, and each citizen has only one social security number. Therefore, the cardinality between social security numbers and citizens is one-to-one.

Every Citizen in the United States Has One Social Security