Asking sick employees to stay home is which type of control?

The Hierarchy of Controls (NIOSH) from most to least effective: Elimination → Substitution → Engineering → Administrative → PPE. ADMINISTRATIVE controls are POLICIES, PROCEDURES, and TRAINING that reduce exposure risk — they change how people work. Asking sick employees to stay home is a WORK PRACTICE POLICY = Administrative control. Engineering controls would be physical barriers/ventilation. Elimination would be removing the hazard completely. PPE is the last resort. A is correct.