Which option most clearly shows ergonomics as primary prevention?

Correct answer: Checking height lighting and tool suitability before work starts

The direct answer is C: checking height, lighting and tool suitability before work begins is ergonomics as primary prevention. Ergonomics means fitting the job, equipment and workplace to people so that work can be done safely, comfortably and effectively. Primary prevention acts before an injury or illness occurs. Step by step: identify possible risks in advance; assess posture, reach, force, lighting and tool design; adjust the workstation; then monitor whether the arrangement works. Option C is correct because it prevents harm at the source before pain or injury develops. Option A is wrong because giving medicine after injury is treatment, not primary prevention. Option B is wrong because replacing a worker after pain increases responds late and may not remove the workplace hazard. Option D is wrong because hiding and failing to report a problem allows the risk to continue. Good prevention protects workers and improves work quality. Memory cue: primary prevention means “change the risk before the injury.”