The Security Category that primarily deals with preserving authorized restrictions on information access and disclosure. Response:

Confidentiality is the security objective focused on preserving authorized restrictions on information access and disclosure, specifically preventing unauthorized individuals from gaining knowledge of sensitive information.

Availability ensures timely and reliable access to information and information systems for authorized users when needed.

Integrity focuses on guarding against improper information modification or destruction, and ensuring information non-repudiation and authenticity.

Authenticity is a property ensuring that information is genuine and from its purported source, which is often considered a component of integrity rather than a primary security category itself.