A nurse is helping an assistive personnel with documenting a client's fluid intake in the medical record. Which of the following values should the nurse identify as a metric unit?

A. 8 Tbsp: Tablespoons are household units commonly used in cooking and informal settings. They are not part of the metric system used in clinical documentation. B. 4 oz: Ounces are part of the imperial system, not the metric system. While fluid ounces are often used in the U.S., they are not classified as metric units. C. 120 mL: Milliliters (mL) are metric units of volume and are the standard for documenting fluid intake in healthcare settings. 120 mL is a precise metric measurement. D. 0.5 cup: Cups are household measurements and not part of the metric system. While commonly used in dietary references, they must be converted to mL for clinical documentation.