The change that the security professional can recommend to reduce the risk associated with the conditions of the server room is to elevate the HVAC intake by constructing a plenum or external shaft over it and convert the server room fire suppression to a pre-action system. The HVAC intake on the ground level poses a risk of contamination, intrusion, or sabotage, as it can be easily accessed or manipulated by unauthorized persons or elements. The ultraviolet light filters installed on the HVAC intake may not be sufficient to prevent or detect such threats. By elevating the HVAC intake, the security professional can reduce the exposure and vulnerability of the HVAC intake, and increase the physical security and protection of the HVAC intake. A plenum or an external shaft can be used to elevate the HVAC intake, and provide a secure and isolated pathway for the air flow. The Aero-K fire suppression in the server room poses a risk of damage, malfunction, or false activation, as it is a gas-based system that relies on a network of sensors, nozzles, and cylinders to detect and suppress a fire. The Aero-K fire suppression may not be compatible or effective for the server room, as it may not be able to reach all the areas or equipment, or it may cause harm to the personnel or the environment. By converting the server room fire suppression to a pre-action system, the security professional can reduce the risk of damage, malfunction, or false activation of the fire suppression system, and increase the reliability and efficiency of the fire suppression system. A pre-action system is a water-based system that uses a two-stage activation process to detect and suppress a fire. A pre-action system requires both a fire detection signal and a sprinkler head activation to release water, which prevents accidental or unnecessary water discharge, and minimizes water damage to the equipment. Remove the ultraviolet light filters on the HVAC intake and replace the fire suppression system on the upper floors with a dry system, add additional ultraviolet light filters to the HVAC intake supply and return ducts and change server room fire suppression to FM-200, and apply additional physical security around the HVAC intakes and update upper floor fire suppression to FM-200 are not changes that the security professional can recommend to reduce the risk associated with the conditions of the server room. These changes may not address the root causes or the main sources of the risk, or they may introduce new risks or issues to the server room or the building. References: Official (ISC)2 CISSP CBK Reference, Fifth Edition, Domain 7, Security Operations, page 737. CISSP All-in-One Exam Guide, Eighth Edition, Chapter 7, Security Operations, page 699.