What Is the Drawback of Using Social Security Numbers (SSN)as

Multiple Choice

What is the drawback of using Social Security Numbers (SSN) as the primary key for tables of employees, hospital patients, students, or cable TV customers?

A) Typing the nine digit SSN numbers is laborious and time consuming.
B) Non-U.S. citizens may not have an SSN.
C) It is not a confidential identification number.
D) It is not a unique identification number.