The breadth and depth of self-disclosure are examined by the social penetration model.
The Social Penetration Model or Theory (SPT) posits that as relationships progress over time, communication between the parties involved moves from shallow to distant levels to levels that are deeper and more intimate.
This theory is used to explain how information flows between one or the parties in a relationship and contributes to the development and dissolution of such relationships.
The correct answer, thus, is D.
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