Concept:Welding produces intense light, sparks, and radiation; eye protection must block these hazards.Explanation:Welding creates ultraviolet/visible light and flying sparks.Ordinary spectacles and contact lenses do not provide adequate protection from these hazards.A face mask mainly protects the face, not specifically the eyes, and may not give the right optical filter for welding.Goggles are designed to fully shield the eyes from sparks, glare, and radiation during welding.Answer:C. goggles.