Helen Fume Is a Recruiter with the Ladders in Nome,Alaska

Multiple Choice

Helen Fume is a recruiter with The Ladders in Nome,Alaska.The Ladders success is largely attributable to its accounting information system.When a client is hired by an employer,Helen creates a record that identifies the employment relationship.Helen follows up on placements by surveying both employers and clients about the employment experience and then entering the results into the AIS.Clients are uniquely identified by social security number.In records that contain client survey data,the social security number is likely to be

A) the primary key.
B) a foreign key.
C) combined with other data fields to form a primary key.
D) null.