Why do you use the Hidden Columns checkbox in the semantics node of your calculation view? Note: There are 2 correct answers to this question.

Why do you use the Hidden Columns checkbox in the semantics node of your calculation view? Note: There are 2 correct answers to this question.
A . To prevent passing columns in stacked calculation views
B. To ensure specific columns are NOT exposed to the reporting tool
C. To remove a column that is also used as a Label column
D. To avoid exposing sensitive columns when defining calculated columns

Answer: B,C