What is the name of Microsoft's personal assistant?

Which of the following is NOT a good reason to define Table Relationships?

A) Other people may use the table. B) Joins will automatically be added. C) There is no risk of using the wrong type of join. D) Table Relationships will auto-define the primary key.

?The variables or expressions that operators act upon are called _________.

Fill in the blank(s) with the appropriate word(s).