Which of the following filtration methods is recommended for an infection risk management mode to...

LEED v5 EQc4: Resilient Spaces allows New Construction projects to establish an Infection Risk Management Mode consistent with ASHRAE Standard 241-2023 and its equivalent clean airflow requirements. Among the choices, ultraviolet germicidal irradiation—more commonly termed germicidal ultraviolet (GUV) in current guidance—is the relevant infection-control air-cleaning technology. USGBC/ASHRAE guidance recognizes GUV as a method for inactivating airborne pathogens and contributing equivalent clean airflow toward infection-risk-management targets. Activated carbon is primarily useful for gases, odors, and selected chemical contaminants rather than pathogen inactivation. Plate-and-frame filtration is not the infection-risk strategy identified by the question. Technically, UVGI/GUV is an air-cleaning/disinfection technology rather than a particulate filter, but C is unequivocally the intended and technically supported answer.