An organization that certifies commercial food service equipment is:

The choice that represents an organization certifying commercial food service equipment is NSF. The NSF (National Sanitation Foundation) is well-known for its role in developing standards for the design, construction, and performance of food service equipment to ensure it is safe and sanitary for use in food preparation and handling. NSF certification indicates that the equipment has been tested and meets stringent safety and health standards, which is pivotal in maintaining food safety in commercial operations.

ANSI (American National Standards Institute) is involved in the development of standards but does not specifically certify food service equipment. The CDC (Centers for Disease Control and Prevention) focuses on public health and disease prevention rather than equipment certification, while the FDA (Food and Drug Administration) regulates food safety but does not specifically certify commercial equipment in the same manner as NSF. Each of these organizations plays an important role in food safety, but NSF is the dedicated authority for equipment certification in food service settings.