Jasna Tells Jeremy When They First Start Dating That She's

Jasna tells Jeremy when they first start dating that she's uncomfortable with him putting his hands on her shoulders. A few months later, she reveals that this is because she was once in an abusive relationship. Jasna's increasing self-disclosure to Jeremy reflects which principle?

A) Self-disclosures occur between two people in a close relationship.
B) Self-disclosing is reciprocal.
C) We disclose a lot in a few encounters.
D) Self-disclosures occur gradually over time.