Which of the following statements about self-disclosure is false?

a. To be labeled self-disclosure, the information shared must be not known by others.
b. The level of self-disclosure generally considered appropriate in mainstream U.S. is similar to what other cultures consider appropriate.
c. Female to female self-disclosure produces the greatest amount and depth of information exchanged.
d. Completely honest and full self-disclosure should occur at an appropriate time and place.