A nurse promotes the use of universal precautions by all health care workers. Which of the following best describes the action that the nurse took?

A. Secondary prevention: Involves early detection and treatment (e.g., screening), not prevention of initial exposure. B. Tertiary prevention: Involves rehabilitation and management of existing disease, not prevention. C. Health care-associated infection: This refers to an outcome or risk, not an action or prevention strategy. D. Primary prevention: Promoting universal precautions helps prevent the transmission of infections before they occur - this is primary prevention.