Which of the following is the best example of mistake-proofing?

Comprehensive and Detailed Explanation From Exact Extract:

In the Patient Safety domain, mistake-proofing (poka-yoke) involves designing systems or equipment to prevent errors before they occur or make them immediately detectable.

Developing special packaging with high-alert warnings for medication labels is an example of mistake-proofing because it integrates a physical or visual control that reduces the chance of human error.

The other options reflect monitoring, inspection, or engagement initiatives — all valuable, but not true error-prevention-by-design mechanisms.