A nurse is assisting an assistive personnel to document a client's weight in the medical record. Which of the following should the nurse identify as a metric unit?

A. Minim: A "minim" is an outdated unit of measurement used in pharmacy and is typically associated with liquid volumes. It is not a metric unit. In the metric system, volume is measured in milliliters (mL) or liters (L), not in minims. Therefore, "minim" is not the correct answer for weight or mass measurement. B. Pound: A "pound" (lb) is an imperial unit of weight commonly used in the United States. It is not part of the metric system. In the metric system, weight is typically measured in grams (g) or kilograms (kg). Pounds are not considered a metric unit of weight. C. Kilogram: A "kilogram" (kg) is the correct metric unit for measuring weight or mass. It is part of the International System of Units (SI), and 1 kilogram is equivalent to 1,000 grams. Kilograms are the standard metric unit used worldwide for weight, making it the appropriate choice in this context. D. Ounce: An "ounce" (oz) is also an imperial unit of weight, not a metric unit. Like pounds, ounces are used in the United States and some other countries but are not part of the metric system. In the metric system, weight is measured in grams (g) or kilograms (kg), not ounces. Therefore, this is not the correct answer for a metric unit of weight.