Which two statements are true about using the Where operator with an output context? There are 2 correct answers to this question.

Which two statements are true about using the Where operator with an output context? There are 2 correct answers to this question.
A . It must contain Boolean operators.
B . It restricts the data used 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,B