Which of the following are acceptable fields to be used in suppressing statements? There are 2 correct answers to this question.

Which of the following are acceptable fields to be used in suppressing statements? There are 2 correct answers to this question.
A . Formula fields with Boolean result "TRUE" or "FALSE" value
B . Custom string fields only
C . Formula fields with Boolean result "YES" or "NO" value
D . Standard string fields only

Answer: A,B