Marie Works for a Busy Pediatrician's Office

Multiple Choice

Marie works for a busy pediatrician's office.The practice has a sophisticated database for all records and information that pertain to the practice.The doctor for whom she works is participating in an academic study,and she needs a report that lists the patient's name,date of birth,and the names of parents or guardians.The doctor would like to see the patient's full name in the format Lastname,Firstname even though they are separate fields in the database.She would also like to see the data for the fields Mother,Father,and Guardian,regardless of whether or not data is actually entered in those fields.  Based on the doctor's requirements for the report,Marie must create a query on which to base the report.
-Marie creates the following expression as a new field in the query that she will use to create the report requested by the doctor PatientName: [LastName] &"," [FirstName].  This expression is an example of ____.

A) IsNull
B) concatenation
C) nonnull
D) an expression using a logical operator