Which of the following terms refers to the unauthorized disclosure of classified information?

The term that specifically refers to the unauthorized disclosure of classified information is best described as an "Information Breach." This term encompasses any instance in which sensitive or classified information is accessed, shared, or disclosed without proper authorization. It emphasizes the security protocols that are violated when such information is mishandled or released, reflecting a significant concern in information security.

While "Security Violation" could imply unauthorized access or failure to adhere to established security policies, it does not specifically highlight information disclosure. "Data Exposure" generally refers to the risk of data being accessible to unauthorized parties but lacks the specificity tied to classified materials. "Confidentiality Breach" can denote a failure to maintain confidentiality but is broader and does not exclusively pertain to classified information. Thus, "Information Breach" is the most accurate term to define the unauthorized sharing of classified information.