An Organization Electronically Processes Sensitive Data Within a Controlled Facility

An organization electronically processes sensitive data within a controlled facility. The Chief Information Security Officer (CISO) wants to limit emissions from emanating from the facility. Which of the following mitigates this risk?

A) Upgrading facility cabling to a higher standard of protected cabling to reduce the likelihood of emission spillage
B) Hardening the facility through the use of secure cabinetry to block emissions
C) Hardening the facility with a Faraday cage to contain emissions produced from data processing
D) Employing security guards to ensure unauthorized personnel remain outside of the facility