Which statement is true of the Where operator when used within a variable? Please choose the correct answer.
A . It instructs the variable to calculate only where certain values are true.
B . It modifies the HAVING clause of the SQL generated to calculate the measure expression.
C . It modifies the WHERE clause of the SQL generated to calculate the measure expression.
D . It is not necessary to place parentheses around the values listed after the Where operator.
Answer: A