Which statement best describes the readiness of a functional fire extinguisher?

A functional fire extinguisher must show no signs of wear or damage to ensure that it will operate effectively in case of an emergency. This means that it should be properly maintained, inspected regularly, and any physical impairment or degradation that may compromise its function needs to be addressed immediately. Fire extinguishers that appear damaged or worn out may not work when needed, posing a serious risk.

The other choices do not directly relate to the operational readiness of the extinguisher. While having an extinguisher out in the open is certainly important for visibility, it doesn't guarantee that the extinguisher will function properly. Optimistic branding or colorful designs may make an extinguisher more noticeable but do not impact its mechanical readiness or operational safety. Therefore, ensuring the extinguisher shows no wear or damage is crucial for safety and effectiveness.